#WWB Science
Is the universe infinite?
Current evidence suggests a finite universe, but it's very early.
How many humans walked the Earth in 300,000 BCE?
Focusing on the genus Homo, rather than only our direct-line DNA ancestors, there were likely over 2 million.
How many galaxies can we see with the naked eye?
Despite billions of galaxies in the universe, most can only see Andromeda. Some can see one or two more.
Can you explain the Big Freeze, Big Rip, and Big Crunch Ideas?
Competing ideas about the end of the universe, with the Big Freeze currently best supported by observations.
Will the universe end in an ever-expanding cold isolated death?
The universe is likely to expand forever toward a cold, isolated end known as the Big Freeze, but that's trillions of years from now.
What is the farthest object in space?
The farthest thing we can observe isn’t an object at all, but the universe’s oldest light. The Cosmic Microwave Background.