As NASA prepared astronauts for its second mission into space, National Geographic had exclusive behind-the-scenes access for ...

The best cycling base layers should have a next-to-skin fit to offer maximum performance and should be the first layer next ...

If old ammo looks clean, intact, and dimensionally sound, it often shoots like new. If it shows obvious corrosion, splits, ...

The deadly legacy of Cold War uranium mines looms over better regulated operations near Navajo Nation land in Arizona.