Curious Cases Folgen

"How fast can a human run and would we be faster as quadrapeds?" This question flew in via Twitter from historian Greg Jenner. Is there a limit to human sprinting performance? In this episode we investigate the biomechanics of running, statistical trends in human performance and which kind of monkey runs the fastest.But first, an experiment. Due to some spurious and possibly fictional injuries, neither Hannah nor Adam are fit enough to take part in a sprint trial at the University of Bath. So long-suffering Producer Michelle steps up to the challenge and into the starting blocks. Not known for her love of athletics, or exercise of any sort, how will she fair in the ultimate speed test?Biomechanist Peter Weyand from Texas discusses the role of different muscle types in speed versus endurance. Sports scientist Polly McGuigan reveals why Usain Lightning Bolt is still the fastest man in the world. And Prof of Sports Engineering Steve Haake reveals how fast a man can run like a monkey.Presenters: Hannah Fry, Adam Rutherford Producer: Michelle Martin.

Do alien civilisations exist? When will ET phone home?In the second part of our alien double bill, Hannah and Adam boldly go in search of intelligence. They may be some time.What will aliens look like? Where should we look for them? And what are the chances of finding complex life in the cosmos? Featuring astronomer Seth Shostak from the SETI Institute in California, exoplanet hunter Sara Rugheimer from the University of St Andrews and zoologist Matthew Cobb from Manchester University,Presenters: Hannah Fry, Adam Rutherford Producer: Michelle Martin.

Mike Holcombe from Largs in Scotland asks, "How do we look for alien life and what are we expecting to find?"In the first of two episodes on the search for ET, Hannah and Adam look for life inside the Solar System. How do we define life and why we obsessed with finding it on Mars? Or should we be looking for space squid on Europa instead?Features interviews with planetary scientist Monica Grady from the Open University, senior astronomer Seth Shostak from SETI and zoologist Matthew Cobb from the University of Manchester.Send your Curious Cases for consideration in to curiouscases@bbc.co.ukPresenters: Hannah Fry, Adam Rutherford Producer: Michelle Martin.