They thought they were studying the earliest evidence of smallpox, but found a different disease altogether.

STONES, BONES, AND WRECKS
Australia's first sub, the AE1, disappeared off Papua New Guinea on September 14, 1914.
It's the earliest physical evidence of ancient Greek parasites.
It might belong to an ancient Egyptian scribe, or to an important official named Djehuty Mes.
Ninety percent of Little Foot's skeleton has been recovered.
For prehistoric residents of Indonesia's rugged Alor Island, fishing was fundamental for both the living <em>and</em> the dead.
A century ago, a French cargo ship filled with explosives ignited spectacularly in Nova Scotia's Halifax Harbor. Researchers think that an unidentified schooner lying at the bottom of the harbor may have been another victim of the blast.
The vessel's treasures likely belonged to an elite Canaanite family.
Teams of scientists are excavating the colonial settlement's tiny churches to see if they can locate the bones of notable historic figures like John Rolfe, Pocahontas's husband.
"We have dramatic proof that living by the sea isn't always a life of beautiful golden sunsets," as one researcher put it.
Hopefully its owner used coasters.
The researchers claim they look like the teeth of one of our hominid relatives—but they are millions of years older.