MEXICO CITY — When she walked into an IVF clinic in June, Alin Quintana knew it would be the last time she would try to conceive a child. She had prepared herself spiritually and mentally for the ...

A newborn baby cannot walk, feed itself or even lift its head. Compared with most animals, human babies are remarkably helpless. Yet this dependence is not a weakness; it is an evolutionary advantage.

For decades, scientists have built bizarre-looking apparatuses for babies to traverse. The purpose of these wobbly bridges, narrow paths, and see-through walkways – all suspended over sheer drop offs ...

As humans expand into space, how we'll continue to expand the species remains an important question. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...