#549 How much space junk is there?
How much space junk is there? There are over 128 million pieces of space junk in orbit around Earth at the moment. […]
#548 How do fireflies glow?
How do fireflies glow? They combine a chemical called luciferin, an enzyme called luciferases, oxygen, and fuel. Fireflies are not actually flies; […]
#547 How is the Internet connected between countries?
How is the Internet connected between countries? Countries are connected by over 500 underwater communications cables. Many people (myself included), think that […]
#546 How does a cochlear implant work?
How does a cochlear implant work? It uses a microphone to turn sound into electrical signals that are transmitted directly to the […]
#545 When did April Fools’ Day start?
When did April Fools’ Day start? No one knows. Although, most theories have it connected to the change from the Julian calendar […]
#544 Was Ferdinand Magellan really the first person to circumnavigate the world?
Was Ferdinand Magellan really the first person to circumnavigate the world? No, because he died about two-thirds into the journey. Ferdinand Magellan’s […]
#543 What is lichen?
What is lichen? Lichen is not an organism. It is a symbiotic relationship between fungus and algae. There is some argument that […]
#542 Why does the USA use the dollar?
Why does the USA use the dollar? Because, in the early days of the American colonies, the Spanish dollar was more prevalent […]
#541 What is the difference between a petrol engine and a diesel engine?
What is the difference between a petrol engine and a diesel engine? They use different fuel, they ignite the fuel in a […]
#540 What makes our hands different to other animals?
What makes our hands different to other animals? We have an opposable thumb. We have four fingers and a thumb on each […]