The millions of species humans share the world with are valuable in their own right. When one species is lost, it has a ...

The 5-HT3A receptor is the only ionotropic serotonin receptor and has been implicated in cognitive functions, yet its specific role remains unclear. To investigate the contribution of the 5-HT3A ...

A new study in The Royal Society reveals that global extinction rates among plants and animals have slowed over the past century. The findings suggest that conservation laws, habitat protection, and ...

Extinction rates are not spiraling upward as many believe, according to a large-scale study analyzing 500 years of data. Researchers found that species losses peaked about a century ago and have ...

Operant conditioning, sometimes called instrumental conditioning or Skinnerian conditioning, is a method of learning that uses rewards and punishment to modify behavior. Through operant conditioning, ...

Could we be on the verge of the sixth mass extinction? To better understand what’s to come for life on Earth–and the current harm we’re doing to our own environment–we have to look into the past. But, ...

Eunice Framm, senior keeper of barnyard animals at the Cincinnati Zoo, has taught pigs to bowl, goats to paint, and red pandas to receive vaccines. She, and all other keepers, do so through the zoo’s ...

Humans have wiped out hundreds of species — with many more on the brink or experiencing large declines in population. Some scientists have argued that we have entered a “sixth mass extinction” event ...

We may not be living through Earth’s sixth mass extinction event ­­— at least not yet. That’s the conclusion of a new analysis of plant and animal extinctions published September 4 in PLOS Biology.

A mass extinction event is a term used to describe a large-scale event that wipes out species. It is usually not a short, one-time incident but rather something that occurs over thousands or millions ...

Dire wolves were massive and highly intelligent animals nearly the size of a small horse, capable of ripping a man’s arm off as easily as a dog kills a rat. They lived in cold regions in a place ...