1. Question: What is the largest planet in our solar system? Answer: Jupiter 2. Question: What is the fastest animal on land? Answer: The cheetah 3. Question: What are the three layers of the Earth?

Astrophysicist and 'StarTalk' host Neil deGrasse Tyson uses the power of Twitter to answer some common questions about our universe. What is a quark? Is there a limit to the expansion of the universe?

Cape Girardeau, MO - A team of leading scientists have come up with a 10 question science quiz you should be able to pass with flying colors if you have a high school diploma. With questions in hand ...