Great Moments In Science - With Dr Karl Kruszelnicki

Ever wondered how in Western gunfights, the person who is first to draw their gun is the first to get shot? It turns out that under threat, our muscles work faster than normal.

Our long-held beliefs about metabolism - you know that thing supposedly responsible for making you put on weight with age - might be wrong.

For most of us, travelling by plane means boarding and buckling in. But Wing Walkers don't stop there - they venture outside of the plane too.

Can you tell someone is sick just by looking at them? It turns out many of us can.

There are mysteries all around us, but here's one that might just be the next Big Breakthrough of Physics! The Muon Magnetic Anomaly.

There are mysteries all around us, but here's one that might just be the next Big Breakthrough of Physics! The Muon Magnetic Anomaly.

There are mysteries all around us, but here's one that might just be the next Big Breakthrough of Physics! The Muon Magnetic Anomaly.

Is it true that Big Agriculture has totally ruined our soil, and used up practically all of its goodness, so there’s barely any nutrition left in our food? Well, no - but like all good myths, there is a small grain of truth.

There's a lot of claims out there about the benefits of taking collagen supplements. Last week we spoke about the structure of collagen and what it does in the body. So what happens when you eat or drink it as a supplement?

One thing that we are quite confident about is that collagen is part-and-parcel of having healthy and glowing skin. But what about the claim that if you eat or drink it, the molecules will magically make their way to exactly where they are needed to smooth out that wrinkle on your face?

Astronomers have measured something amazing – a black hole eating a neutron star. In fact, they found this happening twice in just 10 days. We have found dozens of black holes smashing into each other, and we’ve found a handful neutron stars smashing into each other, but a black hole eating a neutron star – well that’s new!

What creature has survived five mass extinctions, can do just as well in space as on earth, withstand temperatures as hot and cold as you can imagine and perform show-stopping feats of survival? The mighty water bear!

What can chickens teach us about the way out of a pandemic?

Chlorophyll water has re-emerged as a darling of the wellness world - but does it stand up to the hype?

Chlorophyll water has re-emerged as a darling of the wellness world - but does it stand up to the hype?

It's not a good plan to skimp on sleep. A regular seven to nine hours a night puts you in a better position to live longer, and better.

Vaccines are not a new invention. One of the very first effective vaccinations against disease came from China about 1,500 years ago - and was widely used there to combat Smallpox.

Today’s technology has given us an avalanche of information about how, and where, animals travel. We have radar, motion-activated cameras, drones, DNA sequencing, as well as battery-powered geo-location devices that are light enough to be carried by butterfly, but powerful enough to send their data to orbiting satellites.

Our modern periodic table has 118 known chemical elements. About 94 of them occur naturally and the rest were manufactured by us. An element is a pure substance made of atoms that have the same numbers of protons in their central nucleus. What does an atom look like, and where are these protons?

Dr Karl still has more to tell us about the first known computer - this week it's Part 3. After its discovery it took a little while to clean up - and for the conservators to see what was on the inside. They still didn't know what it was meant to do.