Why is it that we like drinks with gas, like beer or coke? If we drink these beverages without it, they taste bad, but gas is tasteless. What effect do bubbles have? Is it just down to the sensation?

What's gravity made of?

Is it true that someone's head would explode if you went out into space without a helmet on?

Is it possible to see a gamma ray burst in the sky? I saw something in the sky flash on and off one night.

We're told that photons can't escape from a black hole, and I was wondering if gravitons can escape from a black hole? If so, what are the consequences of that?

How far is the nearest galaxy?

How do scientists check the distances between planets, and how accurate are their methods?

From a scientific rather than a religious point of view, why should there be a universe? Why isn't there just nothing?

How do scientists measure the life of the sun?

How many human years are there in a light year?

If our weight is the difference between gravity and the centrifugal force of the Earth's rotation, why are we not crushed at either pole area?