That’s right, NASA researchers are currently developing a working tractor beam — “a ray of laser light than can trap and pull objects in the opposite direction of the beam.” One of the methods involves “optical tweezers”, or in other words, two counter-propagating rings that “create a kind of ring-like geometry that confines particles inside.” Video after the break.

The second technique uses optical solenoid beams that spiral around the axis of propagation–just picture a spiral laser beam that can pull particles in the opposite direction of propagation. It does this via electromagnetic effects caused by the laser, and thus requires no atmosphere.

[via PopSci]

A treehouse was probably on your wishlist as a child, but now that many of us have grown older, there’s still nothing wrong with chasing that dream. This modern version was designed and built by architectural firm Baumraum and is located in Munster, Germany on a real private garden. Continue reading for more pictures.

[via Toxel]