A Vending Machine for Crows [video](ted.com)

6 pointsby skenney26há 18 anos1 comments

http://www.ted.com/index.php/talks/view/id/261

1 comments

Very cool. I've had a slight desire to make a simple machine to attract fireflies with a webcam, computer and LED. Apparently male fireflies use a single pulse and females respond with two pulses, but I've never tested or observed this independently.