How big is the smallest habitable planet?

Daniel and Kelly explain how signals get jammed, how to avoid being jammed, and whose music makes the best jam.See omnystudio.com/listener for privacy information. 

Daniel and Kelly answer questions about aliens watching Earth, about lone species, and about the size limits of intelligence.See omnystudio.com/listener for privacy information. 

How much junk can we accumulate in Earth's orbit before we seal off our world? Before we cut the planet off from the cosmos and doom civilization to a new dark age? In this episode, Robert and Julie look skyward to space exploration's garbage.

Earth is our home, but how much longer can it remain so? In this episode of the Stuff to Blow Your Mind podcast, Robert and Christian explore the many threats to terrestrial habitability, from the cosmically distant to the frighteningly close at hand.

In this episode, Robert and Julie interview astrophysicist Neil deGrasse Tyson. What does the planet's leading science communicator have to say about the future of space travel, mind-blowing cosmology and the science in America? Listen in to find out.

Since the Kepler telescope went online, astronomers have found there may be an estimate 40 billion planets like Earth in the Milky Way galaxy alone. What does it take for a planet to be considered Earth-like?