Pouring Molten Aluminum In a Watermelon. Awesome Surprise! by the Backyard Scientist creating a visual arts sculpture by pouring hot molten aluminum in a watermelon.

This homemade flashlight light bar uses ten 100W LED chips to produce an estimated 90,000 Lumens of light. I am working on a CNC aluminum reflector lens/heat sink/housing for these 100W LED chips.

On June 14,2013 SpaceX's Grasshopper flew 325 m (1066 feet)--higher than Manhattan's Chrysler Building--before smoothly landing back on the pad. For the first time in this test, Grasshopper made use of its full navigation sensor suite with the F9-R closed loop control flight algorithms to accomplish...