Time may be a fundamental quality of the universe, but physicists still can't explain what time is. That hasn't stopped theoretical physicist Marcelo Gleiser from devoting much of his life to studying the origins of time and the formation of the cosmos.More
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Science and Technology
“Bad River” is Mary Mazzio’s documentary about a small tribe, the Bad River band of Lake Superior Chippewa, and their legal battle to get rid of an oil pipeline. She examines the conflicting ideas we have about how to live on the land and even whether it can be owned.More
Sutton King wants to change the culture around psychedelic medicines by confronting historical wrongs and getting Indigenous people into key decision-making roles in the psychedelic industry. More
Pharmaceutical companies have a long history of hunting for medicinal drugs, often in Indigenous cultures. Historian Lucas Richert tells the story of how one company went bioprospecting for peyote.More
Tool-making? Agriculture? Language? French neuroscientist Stanislas Dehaene believes there’s an even more basic cognitive skill that gave humans an evolutionary jump start — geometry.More
Math superstar Jordan Ellenberg reveals the geometrical underpinnings of pretty much everything — from pandemics to voting districts to the 14th dimension. If geometry is indeed "the cilantro of math," Ellenberg could convert even the most die-hard hater to the joy of shapes.More
Christopher Benfey tells Anne Strainchamps why there was a hummingbird craze in 19th century Massachsetts, how artists and poets used them as symbols, and why they seem like winged jewels.More
Jennifer Ackerman writes in her new book "What an Owl Knows: The New Science of the World’s Most Enigmatic Birds" about how owls are cryptic, hard to find, and difficult to understand. Speaking to Shannon Henry Kleiber, she said that’s part of the attraction.More
Mark Obmascik tells Anne Strainchamps about the biggest competition in North American bird-watching and how he got drawn into the quest.More
Our producer Charles Monroe-Kane has a passion for ravens. The raven has meaning for him from legend and art, to the point where he’s had one tattooed on his forearm.More
Stephen Alvarez — a National Geographic photographer and founder of the Ancient Art Archive — has spent years documenting ancient rock art around the world. He takes Steve Paulson on a long hike in the Cumberland Plateau, where they find an "unnamed cave" with 2,000-year old engravings.More
Geologist Marcia Bjornerud has a profound understanding of Earth's deep history. The author of "Timefulness," she says geologic literacy would give us a much healthier sense of time. More
In the years when psychedelic science had been shut down, Amanda Feilding helped jump-start research into altered states of mind. Today, she's in her 80s and remains active in psychedelic research with her Beckley Foundation.More
Neuroscientist Christof Koch has pioneered the scientific investigation of consciousness. Recently, he had a mind-blowing experience — both terrifying and ecstatic — with 5-MeO-DMT, also known as toad venom.More
For years, Robin Carhart-Harris dreamed of using brain scans to study people on LSD. He’s gone on to conduct pioneering research on psilocybin, and he’s formulated a theory of the "entropic brain" to explain what happens during psychedelic experiences.More
Physicist Don Gurnett has recorded what you might hear from inside a spacecraft, and it isn't just the sound of desolate silence.More
Steve spoke with Yale astrophysicist Priya Natarajan about the search for invisible parts of the universe, dark matter, and the mind-boggling nature of black holes.More
Speaking in 2017, Journalist David Baron describes how witnessing a total solar eclipse set him on a path to examine how eclipses have propelled many inquisitive minds deeper into the sciences to see more deeply into the universe.More