Healers have treated their patients with silk throughout history. Now they're harnessing its strength, biocompatibility, and biodegradability in innovative new ways.
The young used to report high happiness levels that declined into middle age before increasing into and throughout retirement. Now those levels are changing.
Butch Wilmore and Suni Williams will have to recover from their time in space. Learn more about what happens to the human body when they live in microgravity for months.