lift

U.S. airlines carry more than 800 million passengers per year. Lasha Kilasonia/iStock via Getty Images Plus By Craig Merrett, Clarkson University   Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to curiouskidsus@theconversation.com. How do airplanes fly? – Benson, age 10, Rockford, Michigan Airplane flight is one of the most significant technological achievements of the 20th […]