Astronaut Andrew Fuestel has been to space three times. He says he has a mild fear of heights, but he can push through it. He's OK after reaching hundreds of miles above the Earth.
Despite the incredibly accurate predictions of quantum theory, there's a lot of disagreement over what it says about reality — or even whether it says anything at all about it, says guest Adam Becker.
A study shows that not only do astronaut's genes change in space, but they have the potential to remained changed even months after the astronaut is back on Earth.
NASA is building a new space-based laser communication that will allow live, high-definition video from Mars and beyond — something that's not possible with standard radio equipment.
When Einstein, born 139 years ago on Wednesday, came onto the science scene, physics was in crisis. New ideas were badly needed — it was the perfect moment for a trailblazer, says Marcelo Gleiser.
Hawking was a theoretical physicist who changed how scientists think about gravity. He also wrote the best-selling book A Brief History of Time and lent his machine-aided voice to TV shows. He was 76.
When it comes to facing global warming, dealing with climate change and making informed choices for our cherished "project of civilization," we've been asking the wrong question, says Adam Frank.
As with Ex Machina, says Marcelo Gleiser, director Alex Garland is sending a warning: We are now hacking life itself and will continue to do so with growing efficiency. Are we creating our own doom?