Are lighthouses still necessary? Yes, they are because technology can fail, and some things don’t show up on maps or with sonar. The Lighthouse Directory lists 24,300 lighthouses on its site. The majority of them are still active. This fact alone is enough to show that they are still necessary. Lighthouses cost money to run […]
#754 Are lighthouses still necessary? Read More »
How does a Maglev train work? They use magnets to move the train forwards and to reduce friction. Maglev is the shortened form of magnetic levitation, and it is a train based on the principle of magnetic attraction and repulsion. We all know that when you have two magnets, the opposite poles attract each other
#753 How does a Maglev train work? Read More »
What is flash memory? It is a type of memory that can store data without power and can erase memory in blocks. It is a type of electronically erasable programmable read only memory (EEPROM). Computers store information on their memory chips in binary, which means everything is reduced to a 1 and a 0. When
#752 What is flash memory? Read More »
Did Christopher Columbus really think he had landed in India? Not India, but the Indies, and, yes, he did. When Columbus said he was aiming for the Indies, he wasn’t thinking of India. He was thinking of the islands to the east of Asia, such as Indonesia, the Philippines, and New Guinea. There were no
#751 Did Christopher Columbus really think he had landed in India? Read More »
Why does it rain in a rainforest? Tropical rainforests cause rain when water is released by the trees, but temperate rainforests form where there is a lot of natural rain. There are tropical rainforests and temperature rainforests. Tropical rainforests form in very hot places, just to the north and the south of the equator. Temperate
#750 Why does it rain in a rainforest? Read More »
Why do giant redwood trees grow so big? It is a combination of things. It could be the amount of soil they have access to, it could be the climate in California, it could be their resilience, and it could be because they live so long. Giant Redwood trees are famous for their size. They
#749 Why do giant redwood trees grow so big? Read More »
What vegetables came from the New World? There are many, but potatoes, tomatoes, corn, beans, squash, chili, cacao, peppers, and vanilla are good examples. The foods that came from the New World into Europe ended up changing world cuisine in surprising ways. In the end of the 15th century, Spaniards and other Europeans first reached
#748 What vegetables came from the New World? Read More »
Did Shakespeare write the plays attributed to him? The available evidence shows that, in all probability, Shakespeare was a real person who wrote his own plays. William Shakespeare was definitely a real person. There is no record of his birth and his birthday of 23rd April was given to him by a much later biographer
#747 Did Shakespeare write the plays attributed to him? Read More »
Where and when did language originate? This is an impossible question to answer, but, probably, in and around Africa between 150,000 and 50,000 years ago. Our ability to communicate is obviously one of the things that sets us apart from animals. Nearly all animals have the ability to make sounds, but their communication is limited
#746 Where and when did language originate? Read More »
Does being cold or wet increase your chance of catching a cold? Being wet doesn’t make much of a difference, but being exposed to cold air can increase your chances of catching a cold. And, if you are cold for a long period of time, it can lower your immunity. The common cold is caused
#745 Does being cold or wet increase your chance of catching a cold? Read More »
