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A species of social wasp can recognise its peers by patterns on their faces, but wasps raised in isolation experience less growth of the brain regions thought to be involved in the skill
A species of social wasp can recognise its peers by patterns on their faces, but wasps raised in isolation experience less growth of the brain regions thought to be involved in the skill
MIT and IIT Madras It is now possible to grow and culture human brain tissue in a device that costs little more than a cup of coffee. With a $5 washable and reusable microchip, scientists can watch self-organising brain samples, known as brain organoids, growing in real time under a microscope. The device, dubbed a “microfluidic bioreactor”, is a 4-by-6-centimetre chip that includes small wells in which the brain organoids grow. Each is filled with nutrient-rich fluid that is pumped in and out automatically, like the fluids that flush through the human brain. Advertisement Using this syst...
Life 2 April 2021 Lions have contagious yawns, and they seem to use the open-mouthed behaviour to send signals to each other. The observation provides the first concrete evidence that yawning can synchronise behaviour in an animal species.“Lions share a lot of things, like highly organised hunts and caring for [cubs],” says Elisabetta Palagi at the University of Pisa in Italy. “So obviously they need to synchronise movement, and they need to communicate and anticipate the actions of their companions.” ...
John Guidi/robertharding/Alamy When female sheep get the choice, they would rather mate with a subordinate male than a dominant one. Dominant rams usually mate with ewes much more often than lower-ranking rams do. But they can literally run out of sperm from mating so much in a short period of time. And if they fathered all the lambs in a flock of sheep ( Ovis aries), the group would have less genetic diversity, which can lead to malformations and inheritable diseases. So ewes, which generally mate with several males when they are … Continue reading Subscribe now for unlimit...