Dr. David L. Hu is a mechanical engineer and biologist who studies the interactions of animals with water. He has discovered how dogs shake dry, how insects walk on water, and how eyelashes protect the eyes from drying. During his career, he's won the Ig Nobel Prize in Physics, the National Science Foundation CAREER Award, and the Pineapple Science Prize. Dr. Hu's research has been featured in The Economist, The New York Times, Saturday Night Live, Science Friday, and Highlights for Children. He is the author of the young adult nonfiction book How to Walk on Water and Climb Up Walls.

A professor at Georgia Institute of Technology, Dr. Hu lives with his wife and two children in Atlanta, Georgia. He can be reached at David.Hu@ScienceNaturally.com. Ilias Arahovitis was born in South Africa and was raised in Athens, Greece. In his early years, Ilias's canvas was the floor and walls, but after the age of five, he started using actual canvas to create his first oil paintings. Ilias graduated from AKTO Art & Design College in Athens, and now specializes in children's books, having illustrated numerous books in the last 25 years.