The Family Handyman on MSN

What to know about invisible fencing for dogs

For pet control, an invisible fence is an easy-to-install and convenient alternative to a real fence. But your dog might not ...
Space.com on MSN

NASA's Chandra telescope uses 'X-arithmetic' to reveal how black holes shape galaxy clusters (images)

A novel "X-arithmetic" technique reveals how black holes shape the universe's largest structures.