A leap year is a year that has an extra day added to it, specifically February 29th. This extra day is added to synchronize the calendar year with the astronomical or solar year, which is the length of time it takes for the Earth to orbit around the Sun. TheRead More →

Satdarshan (Paul) Singh Monga, University of Pittsburgh Health Sciences The liver is known for its ability to regenerate. It can completely regrow itself even after two-thirds of its mass has been surgically removed. But damage from medications, alcohol abuse or obesity can eventually cause the liver to fail. Currently, theRead More →

why do we bleed

Mikkael A. Sekeres, University of Miami 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 we bleed? – Michael, age 9, Seattle, Washington “Ouch!” I cried out, looking down at where myRead 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 →

Mario Borunda, Oklahoma State 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. Why does gravity pull us down and not up? – Gracie, age 9, Brookline, Massachusetts Gravity is the reason thingsRead More →