If we look across the whole of the mammal branch of the tree of life, we find there are many groups of mammals that have evolved testicles of all different sizes. In almost all these separate cases, ...

As India prepares to receive its first astronaut, who is returning from the International Space Station, the spotlight turns ...

We know that some animals are bilaterian—meaning they display bilateral symmetry—while others are not, but nature is rarely ...

Scientists found that embryonic skin cells “whisper” through faint mechanical tugs, using the same force-sensing proteins ...

But there's a problem, and a big one at that: The body naturally wants to reject any tissue it knows it didn't manufacture.

Are you looking for a hands-on way to teach your little ones about the human body? This fun Human Body Sensory Bin is a ...

NASA has been studying the effects of space on human health for over 50 years, focusing on how zero gravity, lack of fresh ...

NASA has shared detailed insights on how space travel affects the human body, from radiation exposure to gravity changes.

In science fiction, spaceships moving at or beyond lightspeed enable all manner of universal exploration. But in Earth-bound reality, traveling at the speed of light (299,792,458 meters per second ...