A “biological annihilation” of wildlife in recent decades means a sixth mass extinction in Earth’s history is under way and is more severe than previously feared, according to research. Scientists analysed both common and rare species and found billions of regional or local populations have been lost. They blame human overpopulation and overconsumption for the crisis and warn that it threatens the
It had already been established that dogs respond to human voices better than their wolf brethren, are able to match hundreds of objects to words and learn elements of grammar, and can be directed by human speech. But the new findings mean dogs are more like humans than was previously known: They process language using the same regions of the brain as people, according to the researchers, whose pa
Global warming could increase the chances of polar bears (pictured) encountering grizzlies A possible grizzly-polar bear hybrid has been shot by a hunter in northern Canada. Scientists will have to wait on DNA tests to determine whether it is one of the rare crosses. The two bears generally inhabit different ecological niches. But some experts suggest climate change and melting Arctic ice could in
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