Expert panel says new $56K Alzheimer’s drug is unproven—and worth $8,400 max

Franklin Chang's Plasma Engine Breaks Records in the Latest Tests

What's it really like to live in space? - 50 astronauts, in their own words. The views are great. The bathroom breaks, not so much.

Gus Grissom taught NASA a hard lesson: “You can hurt yourself in the ocean." From the archives: Grissom's infamous (and impactful) ocean landing turns 60 this week.