Episodes

Air Datesort ascending Title
Sep 19, 2016
Sex Post Facto
Sex Post Facto
What’s next.
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Birds do it, bees do it, but humans may not do it for much longer.  At least not for having children.  Relying on sex to reproduce could be supplanted by making babies in the lab, where parents-to-be can select genomes that will ensure ideal physical and behavioral traits.

Men hoping to be fathers should act sooner rather than later.  These same advancements in biotechnology could allow women to fertilize their own eggs, making the need for male sperm obsolete. 

Sep 12, 2016
The Evolution of Evolution
When we control the DNA.
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ENCORE Darwinian evolution is adaptive and slow … millennia can go by before a species changes very much. But with the tools of genetic engineering we can now make radical changes in just one generation. By removing genes or inserting new ones, we can give an organism radically different traits and behaviors. We are taking evolution into our own hands.

It all began with the domestication of plants and animals, which one science writer says created civilization. Today, as humans tinker with their own genome, is it possible we will produce Homo sapiens 2.0?

Sep 05, 2016
Asteroids!
Asteroids!
Weighing the risks.
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Everyone knows that a big rock did in the dinosaurs, but smaller asteroids are millions of times more common and can also make a violent impact. Yet unlike the bigger asteroids, we’re not tracking them. Find out what we’d need to keep an eye on the size of space rocks such as that which exploded over Chelyabinsk, Russia. And how an asteroid whizzed by Earth in late August 2016, only hours after it had been spotted.

Aug 29, 2016
DIY Diagnosis
DIY Diagnosis
Your health in your hands.
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Got aches and pains?  Critters in the Cretaceous would have been sympathetic.  A new study reveals that painful arthritis plagued a duck-billed dinosaur.  Scientists impressively diagnosed the animal’s condition without a house call by examining its 70 million-year old bones.

The technology we use for health diagnoses are becoming so sophisticated, some people are prompted to bypass doctors and do it themselves.  Meet a man who had his genome sequenced and then had all 70 gigabytes delivered directly to him so that he could gauge his genetic health.   

Aug 22, 2016
They Know Who You Are
No place to hide.
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ENCORE You’re a private person. But as long as you’re on-line and have skin and hair, you’re shedding little bits of data and DNA everywhere you go. Find out how that personal information – whether or not it’s used against you – is no longer solely your own. Are your private thoughts next?

A security expert shares stories of ingenious computer hacking … a forensic scientist develops tools to create a mug shot based on a snippet of DNA … and from the frontiers of neuroscience: mind reading may no longer be the stuff of sketchy psychics.

Aug 15, 2016
Are We Over the Moon
Are We Over the Moon?
Lunar return on hold.
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When astronaut Gene Cernan stepped off the moon in 1972, he didn’t think he’d be the last human ever to touch its surface.  But no one’s been back.  Hear astronaut Cernan’s reaction to being the last man on the moon, the reasons why President Kennedy launched the Apollo program, and why Americans haven’t returned.

Now other countries – and companies – are vying for a bigger piece of the space pie. Find out who – or what – will be visiting and even profiting.  Will the moon become an important place to make money?  

Aug 08, 2016
Skeptic Check: After the Hereafter
To heaven and back?
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ENCORE There are few enduring truths, but one is that no one gets out of life alive. What’s less certain is what comes next. Does everything stop with death, or are we transported to another plane of existence? First-hand accounts of people who claim to have visited heaven are offered as proof of an afterlife. Now the author of one bestseller admits that his story was fabricated.

Aug 01, 2016
On Defense
On Defense
Protection strategies.
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The military is a dangerous calling.  But technology can help out, so researchers are constantly trying to make soldiers safer.  Writer Mary Roach investigates how scientists studying so-called human factors are protecting troops from such aggressive foes as heat, noise, and fatigue.  She also learns how bad odors were once considered a secret weapon.

Jul 25, 2016
Musical Universe
Musical Universe
Sounds of silence.
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In space, no one can hear you scream, but, using the right instruments, scientists can pick up all types of cosmic vibrations – the sort we can turn into sound.  After a decade of listening, LIGO, a billion-dollar physics experiment, has detected gravitational waves caused by the collision of massive black holes, a brief shaking of spacetime that can be translated into a short squeal. 

We listen to the chirp of black holes crashing into each other and wonder: could the universe contain more than individual sounds, but have actual musical structure? 

Jul 18, 2016
Raising the Minimum Age
Raising the Minimum Age
How far can technology take us?
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ENCORE  We all try to fight it: the inexorable march of time. The fountain of youth doesn’t exist, and all those wrinkle creams can’t help. But modern science is giving us new weapons in the fight against aging. So how far are we willing to go?

Hear when aging begins, a summary of the latest biotech research, and how a lab full of youthful worms might help humans stay healthy.

Jul 11, 2016
Microbes: Resistance is Futile
Microbes: Resistance is Futile
You are your microbiome.
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ENCORE  You are what you eat. Whether you dine on kimchi, carnitas, or corn dogs determines which microbes live in your stomach. And gut microbes make up only part of your total microbiome.

Find out how your microbes are the brains-without-brains that affect your health and even your mood. Also, why you and your cohorts are closer than you thought: new research suggests that you swap and adopt bugs from your social set.

Plus, the philosophical questions that are arise when we realize that we have more microbial DNA than human DNA.

Jul 04, 2016
Science Fiction True
Science Fiction True
Becoming reality?
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ENCORE  Don’t believe everything you see on TV or the movies. Science fiction is just a guide to how our future might unfold. It can be misleading, as anyone who yearns for a flying car can tell you. And yet, sometimes fantasy becomes fact. Think of the prototype cellphones in Star Trek.

Jun 27, 2016
Skeptic Check: The Me in Measles
Skeptic Check: The Me in Measles
Evaluating risk.
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ENCORE  Wondering whether to vaccinate your children? The decision can feel like a shot in the dark if you don’t know how to evaluate risk. Find out why all of us succumb to the reasoning pitfalls of cognitive and omission bias, whether we’re saying no to vaccines or getting a tan on the beach.

Plus, an infectious disease expert on why it may take a dangerous resurgence of preventable diseases – measles, whooping cough, polio – to remind us that vaccines save lives.

Jun 20, 2016
Elements Never Forget
Elements Never Forget
Periodic appearances.
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It’s elementary, Watson.  Things are in flux – from the elements in the air you breathe to party balloons.   We investigate the massive, historic loss of nitrogen from the atmosphere and meet the culprits behind a modern-day helium shortage. 

But it’s not all a disappearing act: be thankful that oxygen showed up in our atmosphere a few billion years ago.  Meanwhile, atom smashers have recently produced some new elements.  Their appearance was brief, but long enough to fill out the periodic table.

Jun 13, 2016
Surviving the anthropocene
Sobreviviendo al Antropoceno
The planet we made.
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El mundo está caliente y se pone más caliente aún. Pero las altas temperaturas no son el único impacto que nuestra especie está teniendo en la madre Tierra. La urbanización, deforestación y el depósito de millones de toneladas de plástico en los océanos… todas estas son las formas en las que los humanos están dejando su marca.

Así que, ¿seguimos viviendo en el Holoceno, la era geológica que comenzó apenas hace 11 000 años, al finalizar la última era glacial? Algunos dicen que ya estamos en la era del hombre, el Antropoceno.

Jun 06, 2016
How to talk to aliens
How to Talk to Aliens
Broadcasting to space.
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ENCORE  “Dear E.T. …” So far, so good. But now what? Writing is never easy, but what if your task was to craft a message to aliens living elsewhere in the universe, and your prose would represent all humankind? Got writer’s block yet?

What to say to the aliens was the focus of a recent conference in which participants shifted their attentions away from listening for extraterrestrial signals to transmitting some. In this show, we report on the “Communicating Across the Cosmos” conference held at the SETI Institute in December 2014.

May 30, 2016
Caught in a Traps
Caught in a Traps
Volcanos and quakes.
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“Locked and loaded” is how one scientist recently described the San Andreas fault.  Find out when this famous west-coast rift might cause “the big one;” also, the state of early earthquake warning systems.

Plus, another sign of our planet’s unceasing turmoil: volcanos!  Could the eruption that produced the Deccan Traps, and not a rock from space, have been the nail in the coffin for the dinosaurs?  One seismologist shares new evidence about some suspicious timing.

May 23, 2016
Adam Savage
Skeptic Check: Busting Myths with Adam Savage
But is it science?
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Can an opera singer’s voice really shatter glass?  Can you give your car a rocket-assisted boost and survive the test drive?  How do you protect yourself from a shark attack?   Those are among the many intriguing questions and urban legends tested by the MythBusters team in front of the camera.

Now that the series has ended after a 16 year run, co-host Adam Savage tells us how it all began, how he and Jamie Hyneman walked the line between science and entertainment, and why he considers himself a scientist but not a “skeptic.”

May 16, 2016
Science Fiction
Science Fiction
Why it works.
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No one knows what the future will bring, but science fiction authors are willing to take a stab at imagining it.  We take our own stab at imagining them imagining it.  Find out why the genre of science fiction is more than a trippy ride through a bizarre, hi-tech world, but a way to assess and vote on our possible shared future. 

May 09, 2016
Shocking Ideas
Shocking Ideas
Novel uses for electricity.
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ENCORE  Electricity is so 19th century. Most of the uses for it were established by the 1920s. So there’s nothing innovative left to do, right? That’s not the opinion of the Nobel committee that awarded its 2014 physics prize to scientists who invented the blue LED.

Find out why this LED hue of blue was worthy of our most prestigious science prize … how some bacteria actually breathe rust … and a plan to cure disease by zapping our nervous system with electric pulses.