★Crows can recognize human faces and hold grudges for years.★The Eiffel Tower can grow up to 6 inches taller during summer.★A bolt of lightning is five times hotter than the surface of the sun.★A group of owls is called a parliament.★A crocodile can't stick its tongue out.★The average person walks the equivalent of three times around the world in a lifetime.★A group of ferrets is called a business.★Rats laugh when tickled.★A 'jiffy' is one trillionth of a second in physics.★A mosquito has 47 teeth.★Scotland's national animal is the unicorn.★A rhinoceros' horn is made of keratin, the same stuff as hair.★Pigeons can recognize themselves in a mirror.★Tigers have striped skin, not just striped fur.★Octopuses can taste with their arms.★A flock of crows is known as a murder.★The Hawaiian alphabet has only 13 letters.★The smell of rain has a name: petrichor.★Octopuses have three hearts and blue blood.★A hippo's sweat is pink.
★Crows can recognize human faces and hold grudges for years.★The Eiffel Tower can grow up to 6 inches taller during summer.★A bolt of lightning is five times hotter than the surface of the sun.★A group of owls is called a parliament.★A crocodile can't stick its tongue out.★The average person walks the equivalent of three times around the world in a lifetime.★A group of ferrets is called a business.★Rats laugh when tickled.★A 'jiffy' is one trillionth of a second in physics.★A mosquito has 47 teeth.★Scotland's national animal is the unicorn.★A rhinoceros' horn is made of keratin, the same stuff as hair.★Pigeons can recognize themselves in a mirror.★Tigers have striped skin, not just striped fur.★Octopuses can taste with their arms.★A flock of crows is known as a murder.★The Hawaiian alphabet has only 13 letters.★The smell of rain has a name: petrichor.★Octopuses have three hearts and blue blood.★A hippo's sweat is pink.