With morning and nighttime routines alone, people spend plenty of time looking in the mirror, but did you know the history of this everyday item dates to 4000 B.C.? According to Brown University’s ...

An image printed on reflectance paper responds to the direction from which it is illuminated. The reflectance paper is covered with dimples that reflect light from different directions. See video ...

Using ultra-fast laser pulses and special cameras, scientists have simulated an optical illusion that appears to defy Einstein's theory of special relativity. One consequence of special relativity is ...

A strange double object that appeared to be an exact reflection of the same galaxy and its oddball companion, which baffled scientists for years, has led to the discovery of an entirely new galaxy.