French freediver David Helder has been diving for over 35 years, and somewhere along the way he discovered a strange ability. Like a dolphin, Helder can blow perfectly controlled bubble rings underwater. While many divers have playfully experimented with blowing these whirling vortexes, Helder has dedicated significant time to perfecting the technique which he uses to perform dozens of different tricks. Watch the video to see him in action, thing get really interesting around the 2:40 mark. (via Sploid)
Alexander Safonov is a software architect from Voronezh, Russia who currently lives and works in Discovery Bay, Hong Kong. Not content to sit in front of a computer full-time he obtained a diving license in 2002 and started to experiment with underwater photography about two years later. He has since made numerous excursions to photograph underwater wildlife off Cocos Island, Fiji, the Galapagos and Raja Ampat. However his favorite destination is the annual sardine run off the coast of South Africa where most of the photos you see were captured over the last few years. You can see much more of his work on Flickr and 500px.
This incredible water-powered jetpack lets you plow effortlessly through the water like a dolphin as Franky Zapata demonstrates. I only live a few blocks from Lake Michigan and would like to rent one of these by summer — somebody call somebody. (via kottke)