Erasable

A new kind of 3D display could take the form of an acrylic cube with an image inside, which can be erased and rewritten to easily. The new technique can be used to make 2D, 3D and even animated images.

Researchers have developed a kind of electronic “invisible ink” that can alert users to unauthorized tampering with a device. When the chip is exposed to light it will erase information printed on it, making it clear that someone’s opened the box.