Robins Can See Earth's Magnetic Field

U.S. Army soldiers board a helicopter as they leave after the end of their one-year deployment in Kunar province, eastern Afghanistan, in March 2012. PHOTO:

**Note: We are republishing each of the 22 challenges from Catherine’s fiscal cliff article – one a week. Helps to digest them bit by bit!**

By Wikipedia Machine to machine (M2M) refers to technologies that allow both wireless and wired systems to communicate with other devices of the same type.