A couple months before you were born, your skeleton was soft and bendy. It was made out of cartilage, the same material that’s in your nose and ears now. But when certain cells in your body called osteoblasts and osteoclasts began to work together, new bone started to form.
When I saw your question, I headed straight for the Magnetics Lab and met up with my friend John McCloy. I found out the word “magnet” comes from a Greek word for the region of modern-day Turkey we once called Magnesia. That’s where people found magnets in nature.
Movies not only took the ideas and inventions of people, but also the work of a horse. Her name was Sallie Gardner and the debate of her day was whether or not horses ever had all four hooves off the ground during a gallop.