The animal rights organisation says one definition describing an "inhuman" person as "brutish or beastlike" is derogatory to animals.
The findings could provide the foundation for new approaches to repair joint tissues and possibly even entire human limbs.
Researchers reconstructed atmospheric carbon dioxide concentrations dating back 2.5 million years.
Scientist studied tiny, transparent fish to learn more about sleep.
Humans and our primate ancestors have been making and using stone tools for millions of years.
These supernovae showered the Earth with cosmic rays between around 8 million and 2.6 million years ago, potentially leading to an uptick in lightning strikes and, consequently, wildfires.
Scientists were surprised to find the genitalia of female dolphins are packed full of nerves.
Almost all animals of the 162 classified as threatened were in danger because of humans hunting the creatures for food or body parts.
The results could have important implications for understanding when humans and other great apes diverged in evolutionary terms.
It is unclear whether the inhabitants of Earth would be able to adapt to and survive this new climate.
As people mature, their type might change.
Researchers from the University of North Carolina, Chapel Hill have been working to alter the genome of patients who suffer from the deadly genetic disorder Hunter syndrome.
Apple CEO Tim Cook said he fears today's music is losing its "humanity" and spiritual element as algorithms take over for human curators in services such as Spotify.
About 30 percent of participants would not turn off a robot that begged them not to.
Animal-human encounters have risen significantly due to shared habitats and increased conservation.
Researchers reviewed a number of studies into turn-taking behavior in the animal kingdom.
There is no federal law against dismembering a dead body and selling the parts to any buyer, unless those parts are for transplant or from a Native American.
For human drivers, vision is king. But what drivers see depends on how they move the car: Braking, accelerating and steering change the car's position and thereby the driver's view.
Some estimates say there are fewer than 30 vaquitas left in the world.
"It's likely that all great apes can understand at least some of this system of gestures."
Scientists aren't sure when the human lineage became "behaviorally modern."