American Museum of Natural History
American Museum of Natural History: Big Bang Ology Card
Flip this interactive card to start learning about the Big Bang. Answer multiple-choice and fact-or-fiction questions and review some fast facts about this giant explosion that began the Universe billions of years ago.
BBC
Bbc: Origin of the Universe
Try this introduction to ideas about how the universe began and how it might end. Topics include; the big bang and its echoes, antimatter, and inflation/expansion of the universe.