A man has lived for more than 100 days with an artificial maglev heart working inside his chest. In a landmark moment, he was ...

Your eyes could be revealing important health clues. Learn what subtle changes might be trying to warn you about your body.

“One big difference is that whales are often traveling thousands of miles across ocean basins–great whales undertake the ...

That means that the vans are very busy indeed, all the time. So it's a good job we've got the circulatory system to transport nutrients, water and oxygen to the entire body. Your circulatory ...

This article was originally published with the title “ The Circulatory System of Plants ” in Scientific American Magazine Vol. 200 No. 2 (February 1959), p. 44 doi:10.1038 ...