How would we know if time travellers have visited our time period? By looking for tweets, of course.
One of the site's largest subreddits, r/science, has had enough of angry, conspiracy-spouting posters who do nothing but ruin legitimate debate.
The FDA doesn't want 23andMe to offer health advice with its DNA testing kits, but this is surely just the first test for regulators as the home genome industry emerges.
CT scans and 3D printers are making it possible to see fossils that were previously inaccessible inside rock.
"Few people enjoy a perfect sexual relationship - we need to encourage those people to access the services and support they need."
We need to collect billions of data points for analysis by computers, and the only company in major contention to do this soon is 23andMe.
Despite being able to remember minute details from every moment of their lives, the ability to never forget has other costs for some people.
It might seem like our greatest inventions have turned against us - the internet, climate change - but Jason Silva wants to challenge these assumptions with an unrelenting belief in technology as a fundamentally good thing.
Even Peter Higgs thinks that the Nobel Prize doesn't allocate credit for discoveries fairly - but this exploration of the Large Hadron Collider shows that modern science is a large, collaborative process involving hundreds and thousands of brilliant minds
Once the US - which supplies 80 per cent of the world's helium - stops selling off its store at an artificially low price, we have a problem.