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“#Study shows ‘Bystander Effect’ not exclusive to humans” A rat is less likely to help a trapped companion if it is with other rats that aren’t helping, according to new research from the University of Chicago that showed the social psychological theory of the “bystander effect” in humans is present in these long-tailed rodents. Credit:…
“#Milk lipids follow the evolution of mammals” Skoltech scientists conducted a study of milk lipids and described the unique features of human breast milk as compared to bovids, pigs, and closely related primates. Their findings could be indicative of co-evolution of milk composition and the specific needs of the developing organism. Credit: Skoltech Skoltech scientists…
“#How long to play dead in order to stay alive?” A belly-up antlion larva remaining motionless for an unpredictable period testing to destruction the patience of potential predators. Credit: Professor Nigel R. Franks, University of Bristol Many animals remain motionless or play dead after being attacked by a predator in the hope that it will…
“#Making a list of all creatures, great and small” Reticulated giraffe Giraffa (camelopardalis) reticulata, photographed in Kenya in 2013. Giraffe taxonomy is being debated, with the traditional classification recognizing a single species and other classifications recognizing up to eight distinct giraffe species. On the former view, the Reticulated giraffe would be a subspecies, on the…
“#Plant study challenges tropics’ reputation as site of modern evolutionary innovation” The tropics are the birthplace of most rosids, a massive group of flowering plants that includes this Sterculia monosperma, a nut-bearing tree native to southern China and Taiwan. But rosids are diversifying faster in temperate zones, a finding that challenges a longstanding hypothesis about…
“#Giant clams manipulate light to assist their symbiotic partner” The photoprotective effect enables giant calms to live in very shallow tropical waters where there is enough light for photosynthesis, but also potentially harmful UV radiation levels. Credit: Susann Rossbach Special cells in giant clams shift the wavelength of light to protect them from UV radiation…
“#Why are the offspring of older mothers less fit to live long and prosper?” Mother rotifer (Brachionus manjavacas) carrying four eggs (right) and newly-hatched daughter (left). Image of live rotifers acquired using polychromatic polarization and phase contrast. Credit: Michael Shribak, Evgeny Ivashkin, Kristin Gribble The offspring of older mothers don’t fare as well as those…
“#New Zealand’s ancient monster penguins had northern hemisphere doppelgangers” Plotopterids like these Copepteryx looked remarkably like penguins. Credit: Mark Witton. Available for media and current affairs use; all other rights reserved New Zealand’s monster penguins, which lived 62 million years ago, had doppelgangers in Japan, the U.S. and Canada, a study published today in the…
“#Origin of domesticated chicken identified” Credit: Pixabay/CC0 Public Domain A very large international team of researchers has identified the origin of the domesticated chicken. In their paper published in the journal Cell Research, the group outlines the extensive genetic study they conducted and what they learned from it. Until now, the origin of the domesticated…
“#Sledge dogs are closely related to 9,500-year-old ‘ancient dog’” Greenland sled dog. Credit: Carsten Egevang / Qimmeq Dogs play an important role in human life all over the world—whether as a family member or as a working animal. But where the dog comes from and how old various groups of dogs are is still a…