If Earth ever suffers a runaway greenhouse effect (like what has happened on Venus), then our atmosphere would trap excess amounts of solar energy, the air temperature would rise, and the oceans would swiftly evaporate into the atmosphere as they sustained a rolling boil. This would be bad.

Plenty of people get excited about the universe.

In this 21st century, bedtime doesn't matter at all. All that matters is what you set for your DVR [Digital Video Recorder].

Curiously, light-loving green plants reject the Sun's green light, reflecting it back at you, which is why they look green.

I remain fearless of airplanes after 9/11. But during a trip to Los Angeles on a Boeing 767, I couldn't keep my mind from drifting: What's the largest piece of this airplane that could crash into the World Trade Center, explode out the other side, and survive intact? The landing gear? My computer battery? My belt buckle? My wedding ring?

There are countless space activities that would be no less exciting than the moon missions were, I have no doubt. The search for life on Mars, for example.

If Neptune were analogized with a Chevy Impala in mass, then how big is pluto compared to that? Pluto would be a matchbox car sitting on the curb.