#468 What is cotton?
What is cotton? Cotton is a fiber that grows around the seeds of the cotton plant. About 27 million tons of cotton […]
#467 What is a solid-state battery?
What is a solid-state battery? It is a battery that uses a solid electrolyte instead of a liquid solution. As we have […]
#466 Why are carrots orange?
Why are carrots orange? Because they contain carotenoids, which are orange. Carotenoids are organic pigments that are produced by plants, algae, and […]
#465 How does LSD work?
How does LSD work? Nobody actually knows how LSD affects the brain. LSD is the common name for Lysergic Acid Diethylamide. So, […]
#464 How does a hydrogen fuel cell work?
How does a hydrogen fuel cell work? They split hydrogen atoms into protons and electrons to generate electricity. There are several different […]
#463 Why does hot air rise?
Why does hot air rise? Hot air rises because it is less dense than cold air. When something heats up it is […]
#462 When were glasses invented?
When were glasses invented? The first wearable glasses were invented in Italy in the 13th century, but the Romans were using spheres of […]
#461 Why is there a sunken continent underneath New Zealand?
Why is there a sunken continent underneath New Zealand? There is an almost completely submerged continent called Zealandia in the southern hemisphere. […]
#460 How is volcanic ash made and how dangerous is it?
How is volcanic ash made and how dangerous is it? Volcanic ash is made of rock, mineral and glass particles that are […]
#459 Why do we say “born to the purple”? What is Tyrian purple?
Why do we say “born to the purple”? What is Tyrian purple? We say that someone who is born into a royal […]