Practice your "inner bat" (18)

This is amazing, and its good to know that there is still hope should we ever lose our eyesight...
http://www.bbc.co.uk/news/health-22805748

Use your 'inner bat' to navigate

Bats are known for using sound to navigate successfully, and new research suggests we could all use our 'inner bat' to get around.

BBC.CO.UK