Evolution and Natural Selection
It's 150 years since Darwin's theory of Evolution was presented to the Linnean Society, and so we've Naturally Selected the Science of Evolution! We find out why scientists have revisited a textbook example of natural selection in action, find out why horny sheep are gambling on good weather and how bacteria in the lab can evolve into a new species! We find out why tragedy almost kept Darwin's ideas from ever being seen, by looking at the archives of his own letters. Plus, why crocodiles chat from inside their eggs, a new way to send messages underwater and why Martian soil would be good for growing cabbages! And in kitchen science we find out which surface is best for keeping ice cool.
Download as mp3
Does the speed of ice melting depend on what surface it's on? We compare an ice cube on a frying pan to an ice cube on a chopping board...
The evolution of the Peppered Moth is a textbook example of adaptation in the face of changing environmental conditions - yet the design of the original experiments have been criticised. Cambridge University scientists have been updating the experiment...
Evolving organisms on a lab bench allows a perfect view of how they change over time - but sometimes they can surprise us...
In Soay Sheep, having the biggest horns means you're more likely to breed - but it also means you're less likely to survive your first winter...
Charles Darwin's ideas on evolution were presented to the Linnean society on the 1st of July, 1858. 150 years on, we look through Darwin's own letters to find out more...
Can you tell me why, copper the metal is “copper in colour”, yet it is blue when in solution with sulphate, copper carbonate is colourless in solution, and when you flame test the element it is a green flame?
Would [the Kitchen Science experiment - seeing that ice melts faster on a metal surface than on a plastic one] apply to dry ice in the same way?
If you look at the genes of the Peppered Moth what would you see? What would be the differences between the two colours?