#306 Why are we running out of helium?
Why are we running out of helium? It is a non-renewable resource that we are rapidly using up. Many people don’t give […]
#305 When happens when you are bitten by a venomous snake?
What happens when you are bitten by a venomous snake? The venom either attacks the cells, the circulatory system or the nerve […]
#304 Why can we only hear certain frequencies?
Why can we only hear certain frequencies? Our cochlea is only stimulated by frequencies between 20 Hertz and 20,000 Hertz. First, let’s […]
#303 Where does space end?
Where does space end? There is no way of knowing, but there is a horizon 46 billion light years away that we […]
#302 Where does space start?
Where does space start? Technically, it starts at 100 km, but there are five different definitions. Space begins at the Kármán Line, […]
#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 […]
#300 How do hummingbirds flap their wings so fast?
How do hummingbirds flap their wings so fast? By having very strong, fast twitch chest muscles, by twisting their wings instead of […]
#299 How does a photocopier work?
How does a photocopier work? They work because light carries energy and opposite electric charges attract. The first principle that the photocopier […]
#298 How big was the asteroid that killed the dinosaurs?
How big was the asteroid that killed the dinosaurs? It was probably 10 km across, but it could have been anywhere between […]
#297 Why do ant bites hurt?
Why do ant bites hurt? Ants both bite and sting. They drip formic acid onto your skin and some ants inject venom. […]