Extraterrestrial life

Could this asteroid be an extraterrestrial probe?

Scientists say the interstellar object could be alien technology
Researchers in the US say a mysterious asteroid called Oumuamua, and discovered last year over Hawaii, could be an alien solar sail send to look for signs of life. Abraham Loeb is one of the Harvard University astronomers who make the claim. 

(Picture: Handout photo of an artist’s impression of the interstellar asteroid “Oumuamua”. Credit: ESA/Hubble/NASA/ESO/M.Kornmesser/PA)

The Alien Enterprise Part 2

Are intelligent aliens out there?
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.

The Alien Enterprise Part 1

How do we look for alien life, and what are we expecting to find?
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.uk

Presenters: Hannah Fry, Adam Rutherford
Producer: Michelle Martin.