Cows don't just deliver milk - now they're delivering data too. It's a system that lets farmers keep constant tabs on their cattle.
A device called Heat Phone hangs around the cows’ necks and transmits their vital data every 30 minutes. Deutsche Telekom is equipping 5,000 farms across Europe with the technology. For more go to http://www.dw.de/program/made-in-germany/s-3066-9798