On April 22, 2004, former NFL star and U.S. Army Ranger Pat Tillman was killed by friendly fire in Afghanistan — and it may not have been an accident.

Constructed near Prague in the 13th century, Houska Castle has housed mad scientists, Nazis, and perhaps even "demons."

Scientists found that mushrooms "talk" using electrical impulses that spike when fungi come into contact with food sources or potential dangers.

Though the case against Jeff Pelley was ultimately thin with no forensic evidence, murder weapon, or witnesses to hold him responsible, Pelley was nonetheless found guilty in a trial 17 years later.

Betty Reid Soskin endured segregation, contributed to civilian efforts during World War II, and founded one of the first Black-owned record stores — all before becoming the oldest park ranger in America.

In the summer of 2013, 20-year-old Heather Elvis started seeing Sidney Moorer, a 37-year-old with a wife and three children — and by December, Elvis had vanished forever.

Decades after committing his grisly crimes, Jacob Wetterling's killer Danny Heinrich finally admitted how he abducted, molested, and shot the young boy in October 1989.

A gold signet ring purportedly owned by Lucky Luciano surfaced in 2012 with a price tag of $100,000 — even though the seller had no papers to authenticate it.

Affectionately dubbed "Pink Floyd," Flamingo No. 492 escaped from a zoo in Kansas in 2005 and has been on the run ever since.

Rosie the Shark was caught in a family's tuna-fishing net in 1997 before being preserved in a formaldehyde tank and eventually abandoned. But now, she's finally being restored to her former glory.