This DIY sonar glove can 'feel' distant objects underwater
 

If you live in a relatively dry climate, you probably don't worry about underwater hazards during the flood season. If you attend Tsukuba University, Japan however -- just miles from where the Kinugawa River flooded Joso City earlier this year -- the...

http://www.engadget.com/2015/12/29/t...ts-underwater/