As part of an online supplement to the television series "Stephen Hawking's Universe," the Public Broadcasting Service (PBS) provides a biographical sketch about French chemists Marie Curie (1867-1934) and her husband Pierre Curie (1859-1906). Pierre and Marie Curie were awarded the 1903 Nobel prize for physics for work on radioactivity. Marie Curie discovered polonium and radium, and was awarded the 1911 Nobel prize for chemistry for the discovery and isolation of pure radium. A sketch of Marie Curie is available.

It's brown, hard, and hairy. But who does this poo belong to? Take a walk through the trees, and learn all about forest animals from the poo they leave behind--just watch your step!

"Do you smell that? Did you step in something? Eww, that's poo! Watch your step as you take a journey through the jungle to learn all about poo and the animals who make it!"--

Splat! A farm animal just took a poo. But can you figure out who? Use the clues left behind by an animals behind to learn all about animals on the farm.

"Hippos use their tails to fling it around and a giraffe's drops more than five feet before splatting on the ground. What are we talking about? Poo on the savannah! Follow along to learn all about the animals that make it and the habitat they live in"--