Leo's app pick on iPad Today 195 is Cosmos: A Spacetime Odyssey. This is the companion app to Carl Sagan's TV show hosted by Dr Neil deGrasse Tyson on FOX. The TV show explores the laws of nature and our universe in a way that both kids and adults will enjoy.
The Cosmos app for iPad has a lot of additional information with beautiful imagery and videos. It has interactive graphics, including a Cosmic Calendar that condenses the history of the universe on a single calendar year. This is a very visual way to learn more about science and our planet.
For more on Cosmos for iPad, check out iPad Today episode 195 with Leo Laporte and Sarah Lane.