Think animals are always adorable and innocent? Think again! From mischievous monkeys to thieving seagulls, these 5 weird ...

While animals may be calm and solemn when you leave, this behavior is also one of the strange ways animals show that they ...

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The animal kingdom has so many stranger-than-fiction animals. From a glowing green sea slug to a lizard with a toad's head, these weird animals are some of the most fascinating creatures in the ...

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

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From sloths who hang upside down from trees to dolphins sleeping with one eye open, the animal kingdom is full of quirky sleep habits. There are some pretty weird ways in which some animals go ...

Animals have been observed showing strange behaviours before earthquakes. They become restless and even start fleeing. This ...

Researchers have excavated the largest dinosaur footprint site in the U.K. after a quarry worker found tracks left by two of ...