The Wilkinson Microwave Anisotropy Probe, or WMAP, has been gathering information about the Big Bang, dark matter, and the nature of the universe for nine years now, and it's finally being put to rest (rest being a "parking orbit" around the sun).
A new nanoprobe can slip stealthily into a cell and give researchers an opening to monitor the cell's insides for up to a week. That could make the tiny inorganic device the first to implant within a cell without damaging it.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.