Animals

How many pairs of hearts does an earthworm have?

The aortic arches function like a human heart. There are five pairs of aortic arches, which have the responsibility of pumping blood into the dorsal and ventral blood vessels. The dorsal blood vessels are responsible for carrying blood to the front of the earthworm’s body.

Which spider has the most potent venom?

Pholcids, or daddy long-legs spiders, are venomous predators, and although they never naturally bite people, their fangs are similar in structure to those of brown recluse spiders, and therefore can theoretically penetrate skin.

Can turtles talk?

Turtles don’t have vocal cords and their ears are internal, so scientists believed that turtles were deaf and didn’t communicate through sounds. However, research has found that turtles actually communicate at an extremely low frequency that sounds like “clicks, clucks, and hoots” that can only be heard through a hydrophone (a microphone used underwater). These sounds even come from the egg before the turtle hatches. Researchers hypothesize that this helps all the turtle siblings hatch at once.

What does the word ‘aquarium’ mean in Latin?

In the classic Latin language, aquarium means a “watering place for cattle.” However, aquariums these days aren’t for cows—instead, they are a place for the public to see sea creatures. The first aquarium that looks like what you’d imagine now was created in 1921 and opened in 1924 in England.

Where did artists store paint in the 19th century?

Pig bladders were used in the 19th century to store an artist’s paint. The bladder would be sealed with a string and then pricked to get the paint out. This option wasn’t the best because it would often break open. American painter John G. Rand was the innovator who made paint tubes from tin and screw cap in the 19th century.

Why did ancient Egyptians put dead mice in their mouths?

In Ancient Egypt, people put a dead mouse in their mouth if they had a toothache, according to Nathan Belofsky’s book Strange Medicine: A Shocking History of Real Medical Practices Through the Age. Mice were also used as a warts remedy during Elizabethan England.

Who has more neck bones, Giraffes or Sloths?

Despite physical length, there are more bones in the neck of a sloth than a giraffe. There are seven vertebrae in the neck of giraffes, and in most mammals, but there are ten in a sloth. Still, giraffes are among 23 of the world’s biggest living animals.