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SYDNEY: Unwinding household sticky tape in a vacuum emits radiation strong enough to X-ray a human figure, according to a new study in the British journal Nature. Researchers at the University of California, Los Angeles (UCLA), have measured the energy emitted from peeling scotch tape off the roll and found that it peaked at 15-keV and was emitted in short, sharp bursts. "We didn't believe it. We really didn't think it could be true," said co-author Carlos Camara, referring to the team's initial scepticism. "We took some pictures of our hands to see the bones and prove that it was possible. We have a whole collection (of pictures)... it is absolutely remarkable."

European Synchrotron Radiation Facility

JBox2D is a close Java port of Erin Catto's excellent C++ Box2D physics engine. Check out the demos below to see some examples of what it can do.

Click on one of the physics simulations below... you'll see them animating in real time, and be able to interact with them by dragging objects or changing parameters like gravity.

View the Milky Way at 10 million light years from the Earth. Then move through space towards the Earth in successive orders of magnitude until you reach a tall oak tree just outside the buildings of the National High Magnetic Field Laboratory in Tallahass