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“#Termite-fishing chimpanzees provide clues to the evolution of technology” Chimpanzees make these puncturing tools to access underground nests. Credit: Crickette Sanz Researchers, who remotely videotaped a generation of wild chimpanzees learning to use tools, gain insights into how technology came to define human culture. Using the now-ubiquitous manmade technology of motion-activated cameras, researchers who remotely…
“#Shrinking Tasmanian tigers: Resizing an Australian icon” The thylacine, that famous extinct Australian icon colloquially known as the Tasmanian Tiger, is revealed to have been only about half as big as once thought – not a “big” bad wolf after all. Credit: (c) Douglass Rovinsky The thylacine, that famous extinct Australian icon colloquially known as…
“#Zebra stripes and their role in dazzling flies” The mystery of why zebras have their characteristic stripes has perplexed researchers for over a century. Credit: Amelia Gillard, University of Bristol The mystery of why zebras have their characteristic stripes has perplexed researchers for over a century. Over the last decade, Professor Tim Caro at the…
“#Does city life make bumblebees larger?” A bumblebee (Bombus terrestris) on a blueweed plant (Echium vulgare) Credit: Wilhelm Osterman Does urbanization drive bumblebee evolution? A new study by Martin Luther University Halle-Wittenberg (MLU) and the German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig provides an initial indication of this. According to the study, bumblebees are…
“#Primate voice boxes are evolving at rapid pace” 3D image of a gorilla larynx. Credit: Copyright Dr Jacob Dunn, Anglia Ruskin University (ARU) Scientists have discovered that the larynx, or voice box, of primates is significantly larger relative to body size, has greater variation, and is under faster rates of evolution than in other mammals….
“#Avian tree of life better resolved” The hoatzin had a last common ancestor with the Caprimulgiformes (nightjar, sailors, hummingbirds) about 64 million years ago. Credit: André Labetaa Researchers led by Manfred Gahr of the Max Planck Institute for Ornithology in Seewiesen have investigated the relationship of bird families. For the first time, they have been…
“#How boundaries become bridges in evolution” Carotenoid-colored feathers of house finches (Haemorhous mexicanus). Credit: Alex Badyaev There’s a paradox within the theory of evolution: The life forms that exist today are here because they were able to change when past environments disappeared. Yet, organisms evolve to fit into specific environmental niches. “Ever-increasing specialization and precision…
“#Biology blurs line between sexes, behaviors” Credit: University of Rochester Medical Center Biological sex is typically understood in binary terms: male and female. However, there are many examples of animals that are able to modify sex-typical biological and behavioral features and even change sex. A new study, which appears in the journal Current Biology, identifies…
“#This fruit attracts birds with an unusual way of making itself metallic blue” The drupe fruits of the Viburnum tinus plant. Credit: Rox Middleton There’s a reason why blue fruits are so rare: the pigment compounds that make fruits blue are relatively uncommon in nature. But the metallic blue fruits of Viburnum tinus, a popular…
“#A ‘Devonian’ aquarium: Modern mutant fishes replicate creatures of ancient oceans” Skeleton of a mutant (top) and normal zebrafish, showing the structural differences with the jaw. Credit: Tetsuto Miyashita Zebrafish are a common aquarium species, of value to hobbyists and scientists alike. Researchers have now engineered an unusual change in them that has echoes of…