From the ground breaking and life saving to the wacky and implausible, Dr Karl Kruszelnicki reveals some of the best moments in science.
http://www.abc.net.au/radionational/programs/greatmomentsinscience/
Gesamtlänge aller Episoden: 2 days 6 hours 7 minutes
Bird brains - dense, not dumb
Some birds, especially parrots, songbirds and the entire crow family, are surprisingly intelligent - and not just compared with other birds.
The colour of bird poo
Bird poo is usually coloured white—because of the way birds excrete excess nitrogen. But the poo can sometimes be a different colour—because of their diet. Creatures have evolved three main ways of getting rid of excess nitrogen.
What to know about sunscreens
Australia is very sunny, and because of that it's a skin cancer hotspot. UV light triggers skin cancer but sunscreen blocks UV light—so is it better to apply more? Not really—and do not mix your sunscreens because there are two different types.
How the earth is round
Even in this day and age there are people who think that the earth is flat. The educated people of ancient Greece - about two and a half thousand years ago - had already figured out that the Earth was round. They observed the data that was right in front of them.
How the earth is round
Even in this day and age there are people who think that the earth is flat. The educated people of ancient Greece - about two and a half thousand years ago - had already figured out that the Earth was round. They observed the data that was right in front of them.
More about the body when free diving
When diving to very great depths the body has mechanisms to cope - on the way down, and then back to the surface.
The body and free diving
Free diving has a current world record of around 214 m straight down—that's greater than the height of 50-storey building. For thousands of years free divers would collect salvage from shipwrecks to build underwater barricades against invaders.
Probiotics and Pre-biotics
The benefits of natural foods have always been a big deal. And there really is a tiny nugget of truth in the proclamations—but it's been greatly hyped
Longest powered flight
We’ve been flying planes with engines for over a century, so have a guess at the record for the longest duration of powered flight - more than two months! And it was set more than half a century ago.
Infertility and COVID-19 vaccines Part 2
Further intel on a mistruth being spread by social media - that COVID-19 vaccines can cause both male and female infertility. With males, the COVID disease can cause infertility, the COVID vaccines do not. The false claim about female infertility was that the vaccine would make the woman’s own immune system attack her natural proteins. No studies have proved this claim.