The amount of sperm released decreased sharply with each mating during a single day, reducing the males' fertilization rate.

Arizona’s deserts are home to some of the most shocking and elusive creatures on the planet. From bizarre nocturnal hunters ...

Q. I enjoy learning about bizarre animals like the terrestrial one you recently wrote about called a hammerhead worm. With ...

First discovered in 1909 in B.C.’s Yoho National Park by famed naturalist Charles Walcott, the fossil beds have preserved, in incredible detail, the strange animals from our distant past.

The Mariana Trench is the deepest place on Earth, and we're still in the dark about much of the life that calls it home. Here ...

It’s already baffling how many incredible and strange creatures can be found ... So, whether you believe it or not, here is a list of bizarre extinct animals that once lived on our planet.