Michael A. Little, Binghamton University, State University of New York 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. Why do animals have tails? – Kristin M., age 11, Kansas City, Missouri Scientists haveRead More →

Braidee Foote, University of Tennessee 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. Why do cats’ eyes glow in the dark? Chloe, age 10, Barkhamsted, Connecticut Cats and many other animals, including mostRead More →

Shelby A. Ryan, University of Newcastle y Ryan R. Witt, University of Newcastle Why do sloths go slow? Nina, Sydney, aged 5 You’re right, sloths do move very slowly! Sloths live in tropical forests in South and Central America, and they actually move so slowly that algae grows on theirRead More →

Oxygen is the most abundant element on the Earth’s surface and is critical for chemical reactions that keep the body alive, including the reactions that produce adenosine triphosphate (ATP) (a complex organic chemical that provides energy to drive many processes in living cells). Nearly all of the oxygen found on Earth todayRead More →