Astronomers have seen stars and superhot gas flying in orbits that bring them very close to the supermassive black hole in the middle of our galaxy — and this has taught us a huge amount about the nature of black holes.

Black holes have no size, but have a huge mass — and there's an enormous one right in the middle of our galaxy.

Are you accidentally sharing your precise location, whenever you upload a photo?

Reckon you could measure the circumference of the Earth using just a stick and some basic geometry?

You've probably heard cigarettes are bad for you — but did you know tobacco contains radioactive material?

It's said that the 'alkaline diet' can help you lose weight, and fight off cancer — but it looks like these claims don't stand up.

After hearing about the Parker Solar Probe's mission to the Sun, now Dr Karl is taking a closer look at how it'll survive this fiery journey.

There's still a lot we don't know about the burning ball of gas that sustains life on Earth — but the Parker Solar Probe could help.

For some snapping spaghetti is sacrilege — but for others it’s science.

From spaghetti strands to trees to nanotubes — we need to know about the physics of rod-like structures.