#937 How do polar bears find enough food?
How do polar bears find enough food? By having an exceptional sense of smell, a lot of patience, and a very efficient digestion. Polar bears are the largest bear species…
#936 How deep is the desert?
How deep is the desert? Depending on the desert, the sand is between 1 m and 43 m deep. Although, if you count to the top of the largest sand…
#935 When did people start using passports?
When did people start using passports? The idea for the modern passport was introduced by the League of Nations in 1920, shortly after the end of World War 1. It…
#934 Where did stoicism come from?
Where did stoicism come from? It was invented in Athens in 300 BC, by Zeno of Citium (modern day Cyprus). Stoicism is a philosophy that seems to enjoying a revival…
#933 Was Robin Hood real?
Was Robin Hood real? Probably not, but the legend could have been based on a real person. Robin Hood has been made famous by the many movies that have been…
#932 How many countries are nuclear powers?
How many countries are nuclear powers? There are 9 countries that have nuclear weapons. They are the United States, Russia, China, France, the United Kingdom, Pakistan, India, Israel, and North…
#931 How does anthrax kill?
How does anthrax kill? Anthrax is an infection caused by a bacterium called Bacillus anthracis. Because it is a bacterial infection, it can be treated with antibiotics if it is…
#930 Why is there an obelisk in Rome?
Why is there an obelisk in Rome? There is more than one and the Romans took them from Egypt as a show of power. During the Roman Empire, 50 obelisks…
#929 What is impressionism?
What is impressionism? It was a style of art where the artist was trying to capture an impression of the moment. Claude Monet is probably the most famous impressionist, and…
#928 How does a motion detector work?
How does a motion detector work? There are several different methods. They can use infrared light, microwave radiation, ultrasound, video, or electromagnetic radiation. There are many uses for motion detectors…