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We talk to master watchmaker Rebecca Struthers about how people learned to measure time and the twisted way that clocks came to control the way we eat, sleep, work, and relax (if we relax at all). See omnystudio.com/listener for privacy information.

Dr. Celine Gounder — a member of President-Elect Joe Biden’s COVID-19 Advisory Board — answers all of your questions about the Moderna and Pfizer vaccines and details an ambitious plan to vaccinate a third of America. See omnystudio.com/listener for privacy information.

If humans want to explore the solar system (and beyond), we'll have to learn to do something inconceivable for most of us pre-pandemic — exist with each other in tiny quarters for months. Kim Binsted's HI-SEAS program is trying to teach us how to do just that. See omnystudio.com/listener for privacy information.

The star of The Big Bang Theory, Blossom, and the new show Call Me Kat explains how she balances her love of science with her career in acting, and we put her neuroscience Ph.D. to use answering your questions about cognitive disabilities and disorders. See omnystudio.com/listener for privacy information.

It turns out being happy, or becoming happier is possible with a bit of effort. We’re joined by happiness expert and host of The Happiness Lab, Dr. Laurie Santos to talk about her research into human happiness and to take your calls, including one from Mike from Colorado who asks, “Is there a genetic component to happiness?” See omnystudio.com/listener for privacy information.

Every year, another 11 million tons of plastic trash ends up in the ocean. Winnie Lau, senior manager of the “Preventing Ocean Plastics” project, explains why recycling isn't helping — and what we should be doing instead. See omnystudio.com/listener for privacy information.

Who better to answer your science-swimming questions than gold-medalist Simone Manuel? See omnystudio.com/listener for privacy information.

Trevor Cox leads us through a wonderland of sound featuring sonic booms, Stonehenge, and pseudoscientific phenomena. See omnystudio.com/listener for privacy information.

Francis Collins is the director of the National Institutes of Health. He gives us a prognosis for the next few months and diagnoses the future of health research in the U.S. See omnystudio.com/listener for privacy information.

Dr. Priyamvada Natarajan is an expert on the strangest things in physics: warped space, dark matter, dark energy, and even questions from our listeners. See omnystudio.com/listener for privacy information.

Neil Shubin reveals how he discovered Tiktaalik — a long-sought fossil link between swimming fish and walking land animals — and shares other remarkable tales about life's evolution. See omnystudio.com/listener for privacy information.

Atul Gawande is a member of President-elect Joe Biden’s COVID task force. He helps us dig through the latest coronavirus news including vaccine trial results, mask mandates, and how to manage risks over the holidays. See omnystudio.com/listener for privacy information.

Can any part of the long-running film franchise stand up to scientific scrutiny? Matt Gourley — co-host of the James Bonding podcast, among much else — joins to answer all your questions about the coolest gadgets, the craziest stunts, and the glaringest plot holes. See omnystudio.com/listener for privacy information.

The legendary filmmaker teams up with British geoscientist Clive Oppenheimer to explain how meteorites — what they call ”visitors from darker worlds” — have shaped societies throughout history. See omnystudio.com/listener for privacy information.

As different as we humans are from each other — politically and otherwise — we’re all part of the same species. We explore the history of Homo Sapiens and who (or what) might eventually replace us as kings of the forest. See omnystudio.com/listener for privacy information.

This year Science has published an unprecedented series of scathing articles by editor in chief Holden Thorp criticizing President Trump's handling of the dual crises of COVID-19 and climate change. It's finally time for science to join the fight. See omnystudio.com/listener for privacy information.

We get a look inside the mind of Tal Zaks, the Chief Medical Officer at Moderna, as the company develops and tests what it hopes will become the first successful vaccine against the coronavirus. For more episodes like this, subscribe to If I Don’t See You on Stitcher Premium. See omnystudio.com/listener for privacy information.

Are robots coming for our jobs? (Probably not.) If we could remove cancer from our genome, should we? (Probably.) Can our codes of ethics keep pace with innovation? (Let's do our best.) Biotech entrepreneur Juan Enriquez is here to prepare us for tomorrow. See omnystudio.com/listener for privacy information.

NASA's OSIRIS-REx spacecraft has spent four years stalking Bennu, an asteroid that could one day collide with Earth. We speak with Dante Lauretta, the mission's leader, as the probe is about to grab a pebbly sample of Bennu and bring it home. See omnystudio.com/listener for privacy information.

Dr. Karl Linden explains how ultraviolet light can be used to destroy the coronavirus as if by magic — but it’s not magic, it’s science! See omnystudio.com/listener for privacy information.