Human hair and fingernails continue to grow after death.
The horn of a rhinoceros is made from compacted hair and not bone or any other substance.
Fish use a variety of low-pitched sounds to convey messages to each other. However, fish do not have vocal chords.
The happier you are, the less sleep you require to function in everyday life. Sadness increases the urge to sleep more.
Whoopi Goldberg is the only person ever to have an Emmy, a Grammy, an Oscar, a Tony, and a Kids' Choice Award.
Insects such as bees, mosquitoes and cicadas make noise by rapidly moving their wings.
Eating bacon can help you live longer because it contains niacin.
Great whites are the largest predatory fish on earth. They grow to an average of 15 feet (4.6 meters) in length.
Lions are very social compared to other cat species, often living in prides that feature females, offspring and a few adult males.
The difficulty of getting out of bed in the morning is called Dysania.