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.
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