1. The Sun were expanding into a giant star today? How might we cope with this change? 2. It has been claimed that the Dogon tribe in Western Africa has known for thousands of years that Sirius is a...

1. The Sun were expanding into a giant star today? How might we cope with this change?

2. It has been claimed that the Dogon tribe in Western Africa has known for thousands of years that Sirius is a binary star. Search the Web for information about these claims. What is their basis? Why are scientists skeptical, and how do they refute these claims?