Because a lack of usage, I've decided to shut down the video version of my podcast. You can still get all my videos from my YouToube Channel.

Today Fraser is joined by exoplanet researcher Dr. Jason Wright from Penn State University. In addition to the more traditional hunt for exoplanets, Jason is helping define the search for extraterrestrials using all the new techniques available to astronomers.

Today I hang out with astronomer Dean Regas, author with the Cincinnati Observatory and author of 100 Things to See in the Night Sky.

Astronomers working with the NASA’s Chandra X-Ray Observatory and ESA’s XMM-Newton have developed a technique to watch quasars and track the expansion of the Universe over the last 9 billion years. What they found is that the mysterious dark energy that’s currently accelerating the expansion of the Universe doesn’t appear to be a fixed amount. It’s changing, and appears to be increasing over time. If true, it’s a groundbreaking discovery in cosmology, and it could just fortel the end of the Universe.

Geologists think they’ve found the oldest Earth rock ever seen. And they found it in one of the last places you’d ever suspect, on the Moon. When the Apollo 14 astronauts returned their lunar samples back to Earth, they were carrying one rock that had formed on Earth 4 to 4.1 billion years ago, which was carved out of our planet during the time of intense bombardment and delivered to the Moon.

In this week's Questions Show, I wonder if there's a way ion engines can give us artificial gravity, if electromagnetic rail guns can launch space craft, and should we be worried about returning alien pathogens back to Earth?

Today I hang out with astrophysicist Dr. Paul Sutter to talk about space and his new book, Your Place in the Universe.

As astronomers find more and more planets around other stars, the big question we want to know is: are they habitable, could there be life there?

In this week's QA, I answer if it's possible to come to a dead stop, will Mars be more habitable when the Sun expands as a red giant, is there a stellar mass black hole nearby, and more...

In this week's live QA, I sit down with Isaac Arthur. He talks about the challenges of futurism, how he creates so much amazing content, and a new suggestion for the Prime Directive: Don't Be a Jerk.