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“#Between shark and ray: The evolutionary advantage of the sea angels” Complete skeleton of a sea angel (Pseudorhina acanthoderma; SMNS 86214/41) from the Upper Jurassic period (ca. 155 Millionen years) from the Nusplinger Plattenkalke in Baden-Württemberg (Germany). Credit: J. Kriwet The general picture of a shark is that of a fast and large ocean predator….
“#Social bonds in adulthood don’t mediate early life trauma” Harsh conditions in early life are a fundamental cause of adult stress, and according to new research from the University of Notre Dame on wild baboons, this effect is not explained by a lack of social support in adulthood. Credit: University of Notre Dame When baboons…
“#How mutant zebrafish helped unlock the secret to their stripes” Credit: Shutterstock/GrigorevMikhail Zebrafish are one of the most well studied animals on the planet. But how they came by their beautiful black and gold stripes is more of a mystery. Our new research used mathematical modeling—and detailed observations of mutant zebrafish patterns—to get to the…
“#Despite debate, even the world’s oldest trees are not immortal” Credit: Pixabay/CC0 Public Domain The oldest trees on Earth have stood for nearly five millennia, and researchers have long wondered to what extent these ancient organisms undergo senescence, physically deteriorating as they age. A recent paper studying ginkgoes, one of the world’s longest-lived trees, even…
“#How mosquitoes got their taste for human blood and what it means for the future” A wild female Aedes aegypti mosquito resting in a bucket in Thies, Senegal Credit: Noah H. Rose Of about 3,500 mosquito species around the world, only a few have taken to specifically targeting people for biting, making them important spreaders…
“#True colors: Scientists discuss evolution of white coloration of velvet ants” The Thistle-down velvet ant (Dasymutilla gloriosa), a type of wasp, is a rare example of a white-colored creature in a hot desert climate. Utah State University researchers investigated varied explanations for the insect’s pale coloration. Credit: Joseph S. Wilson Driving across the arid American…
“#For chimpanzees, salt and pepper hair not a marker of old age” There is significant individual variation in how chimpanzees, like this one at Gombe National Park, experience pigment loss. Credit: Ian C. Gilby Silver strands and graying hair is a sign of aging in humans, but things aren’t so simple for our closest ape…
“#Skulls of toothed whales have become more asymmetric over time, study finds” Ganges river dolphin skull. Credit: Trustees of the Natural History Museum The skulls of toothed whales have become more asymmetric over time, according to a new study led by UCL and the Natural History Museum in London. The team also found that early…
“#Starfish provide missing link in evolution of key brain messenger molecules” Starfish Asterias rubens. Credit: Ray Crundwell Cells in our nervous system, or neurons, communicate with other cells by releasing chemical messengers, which bind to receptor proteins on neighboring cells and change their activity. Neuropeptides are one type of chemical messenger used by neurons to…
“#5,000 years of history of domestic cats in Central Europe” Perspektywiczna cave inside view during excavation. Credit: Magdalena Krajcarz A loner and a hunter with highly developed territorial instincts, a cruel carnivore, a disobedient individual: the cat. These features make the species averse to domestication. Even so, we did it. Nowadays, about 500 million cats…