Large herbivores dominated the Earth's land ecosystems for several million years before suffering significant extinctions and declines over the past 100,000 years or so.
"We are beginning to transition and go through the extinction," study author David Gruber said. "Who comes out the other side is up for grabs."
The megalodon could reach lengths of 48 to 60 feet and went extinct approximately 3 million years ago. A fossil of the prehistoric shark was found washed up in the sands of the Cayman Islands.
Nearly two-thirds of likely New Hampshire Democratic primary voters said they would prefer a life-extinguishing meteor strike against the Earth over President Trump being re-elected in November.
The duck-billed mammal is currently listed as Near-Threatened on the IUCN Red List.
New research adds more weight to the theory that the asteroid caused dinosaur extinction.
Computer simulations suggest Neanderthals were already on the brink of extinction and had been for hundreds of thousands of years when demographic fluctuations and inbreeding pushed them over the edge.
New research into the global donkey population indicates that the trade in the animal's skins has exploded to such a level that they face population collapse.
"The lives of many people and the existence of diverse species hang in the balance," said an author of the study.
The US Fish and Wildlife Service recently designated Southern Mountain Caribou as an "endangered species"—except, in the lower 48 states, they're technically already extinct.
For animal species to survive climate change, they will have to genetically adapt or shift their ranges—or both.
H. Terminalis is among nine newly identified bee species which are described in a study published in the journal Zootaxa.
Scientists believe that the Earth is currently going through its sixth mass extinction event.
Once a koala population falls below a critical point, it can no longer produce the next generation, leading to extinction.
"We didn't start doing them to not do them," David Bernhardt said of his policies to limit protections for threatened animals and to factor the cost to corporations into protecting endangered species in an interview with The Washington Post published Friday.
There are only 144 kakapos left in the world.
Insect numbers everywhere are declining—and scientists aren't exactly sure why.
Almost all animals of the 162 classified as threatened were in danger because of humans hunting the creatures for food or body parts.
Today some 500,000 bison have been restored in over 6,000 locations.
Data from Cassini's "death dive" reveals Saturn's rings could be just 10 million years old.
Warming waters around the world are turning turtles female on a massive scale.
Researchers link a supernova explosion 2.6 million years ago to the extinction of marine megafauna.
An estimated 70% of land animals and 96% of sea creatures were wiped out in Earth's biggest mass extinction.