January 24, 2019

    Birds see much more contrast in a green environment such as forests than we do
    Seeing the world through a bird’s eye - life short science news

    While the human eye use the primary colors red, green and blue for color vision, birds use in addition a fourth color, invisible to the human eye : ultraviolet.

    With the aid of a special camera and advanced calculations, biologists have been able to figure out what the world looks like through the eyes of birds. It appears that birds perceive the upper sides of leaves much lighter than we do, and from below the leaves appear very dark.

    This enhances contrast dramatically, so that birds can navigate and forage easily in forests, and do not see the forest as a uniform green wall as we do.

    Read the full story: Lund University
    Scientific publication: Nature Communications

    The green fluorescence emitted by corals. Image: NIBB
    Corals attract symbiotic algae with fluorescent green light - life short science news

    Reef-building corals can only live in nutrition-poor waters because they have a symbiotic relationship with dinoflagellates (zooxanthellae, a group of algae).

    It now appears that corals attract these algae by emission of green fluorescent light.

    The attraction of zooxanthellae by corals may help corals to recover from bleaching following periods of high temperatures.

    Read the full story: National Institutes of Natural Sciences
    Scientific publication: Proceedings of the National Academy of Sciences of the USA

    A new snake species was found in the stomach of a coral snake (shown) in 1976, and has only now been described
    New snake species discovered ….. in the stomach of another snake - life short science news

    A snake that had been found in the stomach of a Central American coral snake Southern Mexico in 1976 turns out to be a new species. Researchers have baptized it Cenaspis aenigma (something like « mysterious dinner snake).

    It has quite a few characteristics that are unknown to other snakes, prompting the researchers to place it in a new genus.

    Based on some physical features, it seems likely that Cenaspis aenigma feeds on insects and spiders and lives in burrows. This might explain why, surprisingly, this newly-descibed snake has never been observed in the wild.

    Read the full story: University of Texas – Arlington
    Scientific publication: Journal of Herpetology

    Biodiversity around apple orchards attracts more bee species for pollination
    Why biodiversity is economically important for the production of food - life short science news

    Orchards surrounded by agricultural land are visited by a few bee species, and this leads to relatively poor pollination and production, a new study shows.

    In contrast, natural habitats in the immediate vicinity harbor a rich diversity of bee species that each help to pollinate.

    Thus, this study shows the importance of biodiversity for productivity in agriculture.

    Read the full story: Cornell University
    Scientific publication: Science

    In this electron micrograph, a parasitic mite, Varroa destructor, is wedged between the abdominal plates of a honey bee's exoskeleton. Image: UMD/USDA/PNAS
    Parasitic mite of honeybees does not feed on blood, but on fat - life short science news

    The honeybee parasitic mite Varroa destructor does not feed on blood, as previously thought, but consumes an organ called the fat body.

    This organ not only serves many of the same vital functions carried out by our liver, but also stores food and contributes to the bees’ immune systems. As Varroa eats away the fat body, the bees lose their ability to fight pesticides and stored food.

    Now that it is understood how mites do their damage to bees, effective treatments can be developed.

    Read the full story: University of Maryland
    Scientific publication: Proceedings of the National Academy of Sciences oft he USA

    Bird wars commenced due to climate change Credit: Maurice van Laar
    Climate change sparks deadly war between two bird species - interesting science news

    As the European winters are getting warmer, the pied flycatchers flying from Africa to Netherlands for breeding, are finding that the resident great tits are already claiming all the nesting sites of the season.

    This has resulted in a dramatic increase in flycatchers being killed in great tit nests. Another reason for this is that both bird species rely on a short available burst in food source, which are the caterpillars to raise their young birds.

    However, interestingly, there is no consequence on the both bird population since the birds mostly dying are the surplus males (males who arrive late and hence unlikely to mate). However, this doesn’t bode well for the future if the surplus male population diminishes.

    Read the full story: ScienceDaily
    Scientific publication: Current Biology

    Oysters could be following the lunar cycles
    Werewolves respond to moonlight and Who else? Oysters it seems - interesting science news

    In addition to having a circadian clock and a tidal clock, oysters also have a lunar clock which influences the opening and shutting of the shells. Researchers tracked the behavior of 12 Pacific oysters submerged in France over three and a half lunar cycle for study this phenomenon.

    They found that oysters are most open in the presence of a new moon and least open as the moon entered the first quarter and full phase indicating that they can sense the moonlight even if it has less intensity compared to sun rays.

    The scientists further indicate that moonlight levels might influence the possibility of more food being available during low light levels.

    Read the full story: Gaurdian
    Scientific publication: Biology Letters

    The venomous Green Bush Viper (Atheris squamigera) from Cameroon. Image: Benjamin Tapley
    Why some snakes are deadlier than others - life science news

    Scientists have found out why some snakes have highly poisonous venom, whereas others do not, and why there are such huge differences in the quantities of venom stored in the venom glands.

    Following analyses of over 100 snake species, it appeared that venoms evolved to become more potent against animals that are closely related to the prey the snakes typically eat. Also, the difference in venom storage may be related to the probability a snake will encounter a prey. Therefore, storage is particularly important in the big terrestrial species, and less so in aquatic or species or species living in trees that frequently encounter prey.

    Thus, snake venom evolved in the context of the prey they eat and the environment they live in.

    Read the full story: Trinity College Dublin
    Scientific publication: Ecology Letters

    Barley plants contain a new type of carbohydrate, previously unknown
    New type of carbohydrate discovered in cereals - interesting science news

    A new kind of complex carbohydrate has been discovered in barley, the first discovery of this type in the last 30 years.

    The compound is a polysaccharide containing a mix of glucose and xylose. This hybrid polysaccharide behaves as a structural component of the cellular wall providing strength, but it can also be as viscous as a gel.

    The scientists behind this study claim that many potential applications of the new carbohydrate can be imagined, however further research is required to understand its potential uses.

    Read the full story: University of Adelaine
    Scientific publication: ACS Central Science

    Social media implies a social interaction, however, using it is a solitary activity
    Loneliness associated with attraction to social media - top science news stories - society news

    While everyone is nowadays on social media, one cannot overlook the lack of personal interactions when browsing online. According to a recent scientific study, the desire for using social media is associated with a preference for social isolation.

    The study involved 136 participants that were asked to rate the desirability of 40 images showing social media icons, solidarity activities, people socializing or traffic signs (as control). Participants who gave the social media images a high rating also tended to give the solitary images a higher rating.

    “Social media by design seems to be inherently social, but partaking in the activity itself may lead to greater feelings of loneliness by limiting opportunities for real-life socialization,” researcher Lauren Hill told PsyPost.

    Read the full story: PsyPost
    Scientific publication: Psychological Reports

    Touch-sensing neurons from rodents are also sensitive to sounds
    Sound and touch senses overlap in brain of rodents - daily short science news

    We have the tendency to imagine the auditory and tactile sensation as distinct senses, but according to a recent study, there is an overlap in the brain between the two.

    The study analyzed sensory neurons responsible for perceiving tactile sensations in mice and rats and tested how they respond to other stimuli such as light and sound. Although they were completely insensitive to light, the tactile neurons were activated by sounds.

    The study suggests that tactile and auditory information is processed in parallel in the barrel cortex (the region of the brain studied). This combination of tactile and auditory cues may offer a survival advantage to rodents, for example in dark environments. It remains to see if the same is true for humans and how this would be advantageous for us.

    Read the full story: Nara Institue for Science and Technology
    Scientific publication: PLOS One

    In spring, the protein VRN2 breaks down, allowing another protein, PRC2, to initiate flowering
    How memory of flowering plants works - life short science news

    Plants can sense and remember changes in their environment through the formation and segregation of a protein complex.

    Now, scientists have discovered that one protein in this complex, a protein called VRN2, is extremely unstable, and breaks down when temperatures are high and oxygen is plentiful. It becomes stable when temperatures and oxygen are low, for instance when the winter sets in or during flooding. When VRN2 is broken down when spring arrives, another protein PRC2 becomes available to trigger flowering.

    These proteins might be new targets that could support the development of new plant varieties that are resistant to environmental changes, researchers say.

    Read the full story: University of Birmingham
    Scientific publication: Nature Communications

    Researchers at the University of Washington have genetically modified a common houseplant -- pothos ivy -- to remove chloroform and benzene from the air around it. Image: Mark Stone/University of Washington
    A genetically modified plant to keep the air in your house clean - life short science news

    Scientists have genetically modified the common houseplant pothos ivy to express the protein 2E1 to clean the air in your house from the toxic substances chloroform and benzene.

    These compounds are present in small amounts in chlorinated water or in gasoline used in cars and lawn mowers.

    The plants convert chloroform and benzene into useful substances that they can use for their own growth.

    Read the full story: University of Washington
    Scientific publication: Environmental Science & Technology

    A fossil flowering plant, named Nanjinganthus, showing its ovary (bottom center), sepals and petals (on the sides) and a tree-shaped top.Image: Fu et al., 2018, eLIFE
    Evolution of blooming flowers has been advanced to the Early Jurassic era - life short science news

    A new fossil shows that plants with flowers existed already during the Early Jurassic epoch, some 174 million years ago.

    The fossil has been found in the South Xiangshan Formation, an outcrop of rocks in the Nanjing region of China, and is about 50 million years older than the now second oldest fossil of a flowering plant.

    This discovery fits with existing genetic data that suggested that flowers must have evolved earlier than previously thought.

    Read the full story: eLIFE
    Scientific publication: eLIFE

    Using bicycles for short distances could replace up to 40% of the car trips
    Can we replace cars with bicycles? - science news

    A recent study investigated the possibility of replacing car trips with more active ways of transportation, such as bicycles or even walking.

    According to the study, most people would be willing to give up their car and walk for an average distance of 1.6 km (0.99 miles) or cycle for a distance of 3.5 km (2.17 miles). This means that around 20% of car trips could be replaced by walking and 40% by bicycle.

    The study also assessed the perceived barriers in using bicycles instead of cars. Most participants evoked safety and practical issues as the main reasons for not giving up the car. The findings provide valuable information for developing measures to promote the replacement of cars by other non-motorized transport means.

    Read the full story: Polytechnic University of Madrid
    Scientific publication: Sustainability

    More than 570 million years ago, in the Ediacaran period, complex organisms including soft-bodied animals up to a meter long made their appearance in deep ocean waters.
    Origin of complex animals in deep oceans explained by stability of ambient temperature - life short science news

    How could complex animal life have started in the deep oceans, where food and oxygen are scarce? Scientists think they have found the answer: because of the stable temperature there.

    Early complex animals could not regulate their body temperature themselves, but depended on ambient temperature. In a world with low oxygen, they therefore could not have survived the many temperature swings of up to 10 °C in shallow waters.

    Stable temperatures were thus necessary for complex animals to evolve, and this was only found in the deep oceans.

    Read the full story: Stanford University
    Scientific publication: Proceedings of the Royal Society B

    Bacterial resistance to antibiotics might develop slower when the bacteria are exposed to a stressor at the same time
    Bacteria show slower evolution when facing two stressors at the same time - life short science news

    Bacteria can adapt relatively quickly to altered living conditions, but they are much less efficient in doing so when they are facing two stressors at the same time. New research has shown that predator stress and antibiotics applied together slowed the development of protection and resistance.

    Genetic analyses revealed that predation and antibiotics each induced a unique set of mutations when applied alone, but when combined, also mutate other genes and thus slow down adaptation processes.

    Such slower bacterial evolution when two stressors are presented might lead to strategies to interfere with the development of antibiotics resistance, which represents a growing problem in human health care.

    Read the full story: Max-Planck-Gesellschaft
    Scientific publication: Nature Ecology and Evolution

    Scientists obtained a new sex chromosome in fish. Credit: the researchers via the University of Konstanz
    Experimental hybridization created a new sex chromosome in swordtail fish - science news headlines

    Fishes, unlike mammals that use the standard XX, XY chromosomal mechanism, have a wide variety of sex determination systems. Why this is the case, is currently unknown.

    The better understand sex chromosomes in fish, scientists performed hybridization experiments with swordtail fish with different sex chromosome systems. After more than 100 generations of fish, spanning over 30 years, an evolutionary new sex chromosome was obtained.

    The work shows that hybridization can speed up the evolution of sex chromosomes. Moreover, the study offers new insights into the genomic consequences of the long-term experimental hybridization in fish.

    Read the full story: University of Konstanz
    Scientific publication: Nature Communications

    Scientists scrutinized the painting “Incoronazione della Virgine
    A rich ecosystem of microorganisms found in old painting - science news

    A painting completed in 1620 was analyzed by scientists looking to understand what microorganisms live in such an environment. Using microscopy and microbiology techniques, the researchers concluded that a wide range of bacteria and fungi may live on old paintings.

    Interestingly, while some of them incur damage to the painting, other microorganisms may be used to protect the artwork. The study tested a decontamination formula containing spores of three Bacillus bacteria. It was found to be effective, inhibiting the growth of both the bacteria and the fungi found on the painting.

    It is important to classify the microorganisms involved in biodeterioration of art pieces. Moreover, it is interesting that the study showed that some microorganisms can actually protect paintings.

    Read the full story: ScienceDaily
    Scientific publication: PLOS One

    PIN is only found in the upper end of each cell and marks polarity (magenta). Image: Matouš Glanc
    Plant cells know where is up and down thanks to their mother cell - life short science news

    For plants, it is important to know where is up and where is down, so that roots can grow down into the soil, and the rest of the plant can grow up to the light. Which each cell division as the plant grows, polarity in one of the two daughter cells is lost.

    Biologists have now found that polarity is reestablished through a signal from the mother cell (i.e. from the cell that divided into two new cells), and is not signaled by neighboring cells. This signal depends on enzymatic activity and leads to the proper location of certain proteins such as PIN (a plant hormone transporter) that signal polarity.

    Such signaling makes it possible that plants grow in the correct way.

    Read the full story: Institute of Science and Technology Austria
    Scientific publication: Nature Plants

    In rural areas, children tend to prefer spending time in front of screens instead of going outside
    Kids in rural regions spend less time outdoors - short science news headlines

    A troubling trend is revealed by a new study, showing that even kids from rural areas now spend more time in front of screens and less time outside.

    The study investigated children from rural South Carolina, USA. The results of the study show that screen time was higher than outdoor time for almost all groups tested.

    This change in the behavior of the youth may have profound negative implications for their development. Moreover, it is likely that the same trend occurs currently all over the world.

    Read the full story: PsyPost
    Scientific publication: Environment and Behavior

    Scientists developed an algorithm to measure how influential a film is
    This is the most “influential” film ever, according to science - science news

    An original study investigated over 47,000 films listed on the internet movie database IMDb to understand which one is the most influential film of all times. The top criterion was the number of times one particular movie has been referenced to by subsequent films, similar to how the impact of a scientific paper is measured.

    According to the researches, the most influential film ever was “The Wizard of Oz”, followed by “Star Wars” and “Psycho”. All the films found in the top 20 were produced before 1980. The algorithm used to rank the movies provides an alternative to the standard box office rankings.

    The same algorithm was also used to rank directors and actors. When applied to actors, Samuel L. Jackson, Clint Eastwood and Tom Cruise ranked as the top three.

    Read the full story: ScienceDaily
    Scientific publication: Applied Network Science

    The manta ray fish has two strange horns, but how did they appear?
    Why does the manta ray have horns - daily science news

    The manta ray has two fleshy horns on its head which earned it the name of “devil ray”. The question is how did these horns appear in the evolution of the species?

    To investigate this, researchers studied genetic material from the embryos of the cownose rays, a close relative of the “devil”. The results showed that the horns are in fact the foremost bit of fin, which was modified in time, to serve a different purpose.

    This confirms a theory popular among evolutionary scientists claiming that novel features, often strange ones, can appear in nature from minor evolutionary twists.

    Read the full story: San Francisco State University
    Scientific publication: Frontiers in Ecology and Evolution

    Flounders in Boston Harbor are now free of liver cancer following a massive environmental cleanup. Image: Chris Pickerell, Cornell Cooperative Extension of Suffolk County
    Environmental cleaning pays off: no more flounders with liver cancer in Boston Harbor - life short science news

    Long-term environmental cleanup efforts of Boston Harbor, once one of the most polluted harbors in America, has led to the disappearance of liver cancer in flounders.

    Back in 1985, 75% of the flounders caught here suffered from this disease, but measures to reduce sewage sludge, nutrients and toxins in the harbor, including the construction of an outflow discharge tunnel completed in 2000, dramatically increased flounder health.

    The last flounder with cancer was caught in 2004, indicating that the staggering cleaning efforts have resulted in cleaner water bearing less risk for human health.

    Read the full story: Woods Hole Oceanographic Institution
    Scientific publication: Diseases of Aquatic Organisms

    The adult stage of the newly discovered parastic Zatypota sp. Image: Philippe Fernandez-Fournier
    Newly discovered wasp turns a social spider into a wandering zombie - life short science news

    A new species of parasitic wasp has been discovered in Ecuador that uses a social spider for the development of its larvae. in a rather extreme way, never observed before.

    A female wasp lays an egg on the abdomen of the spider, the larva hatches, and attaches itself to the spider. It probably feeds on the spider’s haemolymph (resembling our blood), grows, and takes over the spider’s body.

    The spider is now under control of the wasp larva, exits the colony and spins a cocoon, before the larva kills and eats it. The well-fed larva enters the cocoon and develops into an adult wasp in nine to eleven days.

    Read the full story: University of British Columbia
    Scientific publication: Ecological Entomology

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