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 ...

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 ...

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 ...

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What was the dire wolf? Like many species lost before living memory and known only from remains, the 1854 discovery of a jawbone from this extinct North American predator was more suggestion than ...

Credit...Photo illustration by Tyler Comrie. (Georges Seurat, “A Sunday on La Grande Jatte — 1884,” via the Helen Birch Bartlett Memorial Collection/The Art ...

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