Welcome to this weeks Kids Discover Free Topics of the Week June 3 – 9 Here is our weekly digest of free topics. Check them out now before they expire by the end of the week. In addition to these, up to 20% of our library is free on any given day. Simply login to enjoy. Space Exploration in the Twentieth Century In the twentieth century, the dream of space travel became real. It started in 1957, with the launch of the first human-made object into space. The Sputnik 1 satellite, which orbited Earth, was built by the USSR. Skull, Ribs, and Spine The axial skeleton includes the skull, ribs, and…