#362 Why can we eat lettuce and spinach, but we can’t eat leaves and grass?
Why can we eat lettuce and spinach, but we can’t eat leaves and grass? We can’t eat leaves and grass because of the cellulose and silica they contain. There are…
Why can we eat lettuce and spinach, but we can’t eat leaves and grass? We can’t eat leaves and grass because of the cellulose and silica they contain. There are…
Why were alarm clocks the first consumer goods to stop being rationed during World War 2? Because, as you would expect, people couldn’t wake up in time to work. People…
When were latitude and longitude invented? Latitude in about 600 BC and longitude in AD 1736. Latitude are the horizontal lines that measure your distance to the north or the…
Why do we say north, east, south, and west? The cardinal directions north, east, south, and west came about because of the position of the sun in the sky. Nobody…
Where did the circus come from? The modern circus was invented in 1768, but the idea of a show in an amphitheater goes back thousands of years. The word “circus”…
How are tower cranes assembled? By raising themselves up and adding in a piece at a time. There are many different types of cranes, but they are divided into two…
#433 Why does an elastic band stretch? Why does an elastic band stretch? Because it is made of long chains of polymers that would rather be tangled together than straight.…
How does antibiotic resistance happen? Bacteria develop the ability to survive an antibiotic, which is then passed on to future generations. The antibacterial power of some moulds has been known…
How does a skeleton key work? By removing all of the parts that would get caught on the wards. Skeleton keys are also known as pass keys or master keys.…
When did supermarkets start? The first supermarket was opened in 1916. Most of us don’t think twice about pushing a cart around a supermarket and then heading to the cash…