Missy Tracewell said she cried and jumped up and down "like a five-year-old" when she found the tooth of the prehistoric predator.
The largest of these prehistoric species was 10 times the length of anchovies living today.
"The quantity of fish we have found and studied are unprecedented in the central Sahara," researcher Savino di Lernia told Newsweek.
248 million-year-old fossils discovered in Russia almost 60 years ago re-examined by scientists.
The "hypercarnivore" lived 22 million years ago and probably ate the ancestors of hippos and elephants.
When other animals have more calories, why would pre-historic humans eat each other?
While the finding could have exciting implications for many scientific fields, the thawing of permafrost may not be good news for humankind.
The prehistoric object was discovered in the 1980s but had never been studied.
The toys' purpose was unknown, but the grave belonged to a "common child," as opposed to one of an elite social class.
Russian authorities found 24 teeth from a prehistoric sea predator that may have been related to the largest ever shark, in the baggage of a man set for China.
Humans left Africa 60,000 years earlier than we thought.
Evidence suggests ancient humans may have hunted the mammoth and then stored the meat at the bottom of a pond.
The discovery reverses assumptions about one of the most famous dinosaur fossils ever found.
Neolithic women have not been given enough credit, researchers said.
Mammoth ivory, like modern elephant ivory, is durable and doesn't splinter easily, and so makes a good spear for hunting.
The migration may have been less about opportunity elsewhere and more about hardship.
Skeletons of four, unrelated men offer major insight into the sex lives of our early ancestors.