Why is the sperm of rodents so much longer than the sperm of large mammals, like primates? That's a question that researchers have long struggled with. Now, they may have the answers.
Bats may have the heaviest wings comparatively to their body size-but why? Scientists have taken a closer look at bat wings and have found that they're specially designed to allow the mammals to land upside down.
Researchers have discovered a 170-million-year-old mouse-sized fossil from the Middle Jurassic, which is revealing new information about the evolution of molar teeth in modern mammals.
The curtains may be closing on the orca shows at SeaWorld. The park has announced that it will be phasing out its traditional Shamu show in San Diego and replace it with one that's less about tricks and more about orcas' natural behaviors in the wild.
How do tiny insects and other animals clean themselves? Without this ability, these creatures would soon find themselves unable to properly function. Now, scientists have taken a closer look and have found that hair plays a huge role in keeping creatures filth-free.
Cougars may actually recolonize the middle part of the United States within the next 25 years.
Scientists may just have uncovered the largest rat in history. They've found the fossils of seven giant rat species on East Timor, with the largest up to 10 times the size of modern rats.
Researchers found that the declining populations of large-bodied mammals made a major impact on their ecosystems, changing their structures over time.
Mammoths may have actually survived into present day were it not for their bad "mineral diet."
When we lose large mammals to extinction, we don't just lose them; we also lose their poop. Now, scientists have found that the loss of large mammals may just change landscapes forever.
Obstacle avoidance may be easier than it sounds when it comes to echolocating bats.