Biology For Kids

Dr. Jonas Salk is one of the most celebrated doctors and medical researchers of the 20th century. The child of immigrants who never learned to speak English, Jonas was struck by the devastation he saw when the soldiers returned from battle after WWII. Determined to help, he worked to become a doctor and eventually joined the team that created the influenza vaccine. But Jonas wanted to do more. As polio ravaged the United States - even the president was not immune! - Jonas decided to lead the fight against this terrible disease.

The life cycle of a frog is very interesting. First, a frog will lay its eggs in water. The eggs are inside a jelly-like covering. Soon tadpoles begin to grow inside the eggs. They have a head, body, and tail. Tadpoles swim in the water feeding on tiny plants called algae. As a tadpole grows, it will develop hind legs and then front legs. Then a tadpole will develop lungs and go to the surface of the water to breathe. Now the tadpole looks more like a frog. It will climb out of the water to eat insects and worms. Listen to this fun, factual audiobook about the life cycle of a frog!