Union and Confederate soldiers shake hands on the Gettysburg battlefied 50 years after the battle, 1913

An MRI of what it looks like when you rub your eyes

The speed of light visualized

A father and son in Istanbul, Ottoman Empire, c. 1890.

In Japan, people don't have signatures, instead they use stamps called Hanko and every individual in Japan has one.

Large piece of ice breaks apart and gets separated from Lake Michigan.

Many insects use the "Tripod Gait" to walk - three legs lift and move while the other three legs support

Tank destroyed by missle

Water vapour illuminated by a led lights

Lava flowing into the ocean.