Body parts Facts Wisdom teeth serve no purpose. They’re left over from hundreds of thousands of years ago. As early humans’ brains grew bigger, it reduced space in the mouth, crowding out this third set of molars. Your fingernails don’t actually grow after you’re dead. Our nose can detect about 1 trillion smells. Thumbs have…
Solar System The Solar System formed around 4.6 billion years ago. Some of the fastest meteoroids can travel through the solar system at a speed of around 42 kilometres per second (26 miles per second). The first man made object sent into space was in 1957 when the Russian satellite named Sputnik was launched. Do…
Rats breed so quickly that in just 18 months, 2 rats could have created over 1 million relatives. The blue whale can produce the loudest sound of any animal. At 188 decibels, the noise can be detected over 800 kilometres away. Horses and cows sleep while standing up. Giant Arctic jellyfish have tentacles that can…
Humans get a little taller in space because there is no gravity pulling down on them. Rabbits and parrots can see behind themselves without even moving their heads! Butterflies taste food by standing on top of it! Their taste receptors are in their feet unlike humans who have most on their tongue. Most of the…