As well as a brain-like item, the mysterious package also contained flowers and what appears to be foreign currency.
The shark was later euthanized, as animal control officials found that it was injured.
A 3-inch tooth was found on a dirt path in Eglin Reservation, northwest Florida. Paleontologists suspect it came from a quarry.
Conservationists say they rediscovered a rare species of glass frog, the Bolivian Cochran frog, during a rescue mission in Carrasco National Park. The frog has not been seen in Bolivia for 18 years.
Researchers claim to have identified its author using signs from the shape of the 'e's to the "rampant lion" watermarks.
A century-old message from two bricklayers was recently discovered at Montclair State University in New Jersey.
The notorious mass murderer once again trended on social media following the airing of new documentary "Ted Bundy: Mind of a Monster."
The six-part docuseries, produced by Emmy-winning filmmakers Simon Fuller and John Downer, premieres Sunday.
The fourth season of the robot fighting show airs on the Discovery Channel on June 7.
The canyon was first found by Europeans in 1541.
These pests might be more of a threat to livestock than to humans, but so far none have been found with any human diseases.
In a race against tunneling looters, archaeologists stumbled on an "extraordinary" discovery just outside where the lost city walls once stood.
The cave stretches more than 200 miles.
"The secular science community has no viable answers to explain remarkable finds like these."
Fishing was so central to the inhabitants of that era that it took on a spiritual meaning, not just a practical one.
A major advance in synthetic biology was made public this week.
It was in the deepest sea trench on earth.
Archaeologists discovered the trove of artifacts on the Mediterranean seabed near the city of Alexandria.
Researchers believe the discovery of an advanced Roman-style bathhouse on the site indicates the existence of a city.
Shepherds from the Hraunkot farm in southern Iceland thought they had spotted a goat. Then they met Einhyrningur.