From natural wonders to budding cities, see what California looked like during the 19th century in some of the very first images ever captured in the Golden State.

After Witold Pilecki infiltrated Auschwitz and created detailed reports of its atrocities which he smuggled to the Allies, he actually managed to escape the infamous death camp and continue fighting the Nazis and defending his homeland.

From President Cleveland's tumor to Albert Einstein's brain, the Mütter Museum at the College of Physicians of Philadelphia holds an array of macabre anatomical curiosities.

From Che Guevara to Charlie Chaplin to the Challenger space shuttle crew, these poignant photos capture historical figures who left a lasting mark on the world.

Egyptologist Nicholas Reeves thinks there are multiple hidden chambers inside King Tut's tomb that could contain the long lost remains of Queen Nefertiti.

In November 1939, the Red Army invaded Finland for what they thought would be a quick and easy territory grab, but the heavily outnumbered Finns held them off for three months in what became known as the Winter War.

Starring in Buffalo Bill's Wild West show, Annie Oakley made a name for herself as one of the first female celebrities in sharpshooting.

After the stock market crashed in October 1929, the Great Depression soon followed — ushering in a period of widespread unemployment, homelessness, and destitution.

Lake Natron in northern Tanzania is so alkaline that just three species of fish can survive in its waters, and it calcifies birds that die on its shores.

A successful businessman in Fall River, Massachusetts, Andrew Borden was killed in an ax murder that claimed both him and his wife Abby on August 4, 1892.