Cops tracking gang activity frequently need to decipher graffiti, decoding messages, identifying gangs and even monitoring individual people by looking at their bubbly letters and spray-painted scrawls. New software can help speed the process by automatically checking graffiti against a library of street art.
Like parents of twins, wildlife biologists can easily differentiate between similar-looking creatures by noting slight differences that an outside observer would miss. But in the wild, it can take some time to locate the right animals so they can be identified.
A new algorithm can scan zebra photos like they were bar codes, helping researchers track individual animals more easily.
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.