Accept the system updates Microsoft sends. As new vulnerabilities to Windows XP are found, Microsoft creates patches, but you need to turn on automatic updating (or download them manually) to install them. Although there are fewer threats to Macs, the same rule applies: Keep your system updated.
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.