#301 When were the first binmen / garbagemen?
When were the first binmen? Technically, in England in the 14th century. Trash is a tremendous problem in the world at the moment. Our refuse sites are full, we release…
When were the first binmen? Technically, in England in the 14th century. Trash is a tremendous problem in the world at the moment. Our refuse sites are full, we release…
How do hummingbirds flap their wings so fast? By having very strong, fast twitch chest muscles, by twisting their wings instead of flapping them, and by being able to use…
How does a photocopier work? They work because light carries energy and opposite electric charges attract. The first principle that the photocopier relies on is that light carries energy. Light…
How big was the asteroid that killed the dinosaurs? It was probably 10 km across, but it could have been anywhere between 10 and 17 km. The asteroid that killed…
Why do ant bites hurt? Ants both bite and sting. They drip formic acid onto your skin and some ants inject venom. Not all ants bite. There are estimated to…
Could nuclear fusion power the Earth? Yes, but not in this half of the 21st century. Nuclear fusion and nuclear fission are the two ways we can get energy out…
When did people start using punctuation? The Greeks were the first people to use punctuation, but the Bible made it commonplace. Most early languages used a writing system that was…
Why do we get headaches? There are many theories, but nobody actually knows. There are 200 different types of headaches, but they are divided up into primary and secondary headaches.…
How does a rocket engine work? Rocket engines work because of Newton’s third law of motion. Newton’s third law of motion states “to every action there is always opposed an…
What makes us itch? Itching is caused by the release of the chemical histamine. There are different types of itch. Almost all animals have an itch and scratch response. Bears…