In this Halloween episode, learn how scientists were able to get three people to communicate with each other using only the power of their brains, and why toxic mold might make you see ghosts. Plus, hear the story of “Cropsey,” a terrifying boogeyman who turned out to be real.

Learn about why pop songs are getting sadder; a mysterious radio signal coming from outer space every 16 days; and why it pays to be yourself when you’re in a high-stakes situation.

Learn about the key ingredients for forging a friendship; why it’s so hard to make decisions with friends; and what it would mean if dark matter doesn’t exist and the law of gravity is wrong.

Learn about how birds could help us predict natural disasters; fairy tales’ old origins; and how breaks and sprains heal.

Learn about why your creep radar is probably terrible; the science of spontaneous human combustion; and the one belief that determines employee honesty.

Learn how superstitions can actually reduce anxiety, why rebooting can often fix computer problems, and why the first full dinosaur skeleton ever found is finally being studied 160 years later.

It's hard to count on a world that's constantly changing. That's why it's vital to grow internal strengths like grit, gratitude, and compassion — at least, according to Dr. Rick Hanson, a Senior Fellow of the Greater Good Science Center at UC Berkeley and author of "Resilient: How to Grow an Unshakable Core of Calm, Strength, and Happiness." In this episode, he discusses the key to resilience, and to lasting well-being in a changing world.

Learn about anger makes you look guilty; a new quantum microscope; and why the fight against cancer is going very well.

You might be able to survive for a bit longer than you think.

Learn about the “birthday paradox.” Then, George Craford — one of the pioneers of LED lighting — talks LED innovation.

Learn about how blind people can describe what animals look like, how “Ring Around the Rosie” probably doesn’t reference the Plague, and why scientists used Cladosporium sphaerospermum, a radiosynthetic species of fungus, to build a radiation shield.

These two men are the ultimate friendship goal.

Learn about a research-backed way to achieve better self control by asking for help from others; how Ambystoma salamanders “steal” DNA from other species via kleptogenesis; and how your brain can process visual information as sound.

Learn how quickly you’d age if you could move at the speed of light; how scientists discovered that Neanderthals actually walked upright; and why hangovers seem to get worse with age.

Learn about how we might get rid of mosquitoes in the future, with author Tim Winegard; why the Sargasso Sea has no coastline; and, the story of how Russian surgeon Leonid Rogozov removed his own appendix.