Weird cat

Venezia

Big fighter

China successfully launched its first Tianwen 1 Mars exploration probe.

Macro photography of the blood vessels of the human eye

NY

Prague

Tracer round

A hog nose snake’s hypnotic defense pose

Why does a mosquito bite itch?

Before a mosquito bites its "victim," it injects a special substance that prevents blood proteins from clotting. Mosquito saliva, surely, is not poisonous, but it causes all the unpleasant effects of the bite: swelling, itching and redness.

In fact, all these results of injected anticoagulant on the skin are nothing but an allergic reaction

Visualization of the speed of light

Adolf Hitler declaring war on America, December 11, 1941.