Lions sleep up to 20 hours a day. They spend the remainder of their time hunting, socializing, mating and grooming. They are most likely to be active in the late afternoon and at night. More »

According to the University of Washington, cows sleep for approximately 3.9 hours per day, meaning that they spend about 16.9 percent of the day sleeping. Adult humans sleep for approximately 8 hours per day, which repre... More »

In general, astronauts are advised to sleep for eight hours at the end of their daily missions. Just like on Earth, astronauts have reported that they have dreams and nightmares and some experience snoring. More » Science Astronomy Space Travel

During the mating season, lions can mate anywhere from 20 to 40 times in a day for several days straight. Male lions will check whether the lionesses are in heat by sniffing their reproductive organs. More »

A male lion will usually sleep 18 to 20 hours per day. However, after eating a big meal, it is possible for a lion to sleep a full 24 hours. Female lions usually sleep 15 to 18 hours per day. More »

The three terms that are used to describe organisms such as lions are third order heterotrophs, tertiary consumers and top carnivores. Lions are also known as apex or top predators. More »

There are many differences between lions and tigers, including coat differences and different habitats. Lions and tigers are also different sizes, and raise their young differently. More »