Episodes

Wonder Women
Nov 20, 2017
Challenging science culture

We’re hearing about harassment of, and barriers to, women seeking careers in politics and entertainment. But what about science? Science is supposed to be uniquely merit-based and objective. And yet the data say otherwise. A new study reveals widespread harassment of women of color in space science. 


Skeptic Check: Nibiru! (Again!)
Nov 13, 2017
Doomsday redux.

Will your calendar entry for November 19th  be your last? Some people say yes, predicting a catastrophic collision between Earth and planet Nibiru on that date and the end of the world.  But it won’t happen, because this hypothesized rogue world doesn’t exist. Nibiru’s malevolent disruptions have been foretold many times, most dramatically in 2012 and three times so far in 2017.  But this year NASA issued a rare public assurance that doomsday was not in the offing.


DNA: Nature's Hard Drive
Nov 06, 2017
What surprises are in storage?

The biotech tool CRISPR lets us do more than shuffle genes.  Researchers have embedded an animated GIF into a living organism’s DNA, proving that the molecule is a great repository for information.  This has encouraged speculation that DNA could be used by aliens to send messages. 

Meanwhile, nature has seized on this powerful storage system in surprising ways.  Scientists have learned that the 98% of our genome – once dismissed as “junk” – contains valuable genetic treasure. Find out what project ENCODE is learning about the “dark genome.”


Venom Diagram
Oct 30, 2017
One animal’s poison is another’s cure.

ENCORE  We all get defensive sometimes.  For some animals, evolution has provided a highly effective mechanism for saying “back off!”.  A puncture by a pair of venom-filled fangs gets the point across nicely. 

But one animal’s poison may be another’s cure.  Some dangerous critters churn out compounds that can be synthesized into life-saving drugs.

Meet the spiny, fanged, and oozing creatures who could help defend us against such illnesses as hypertension and kidney disease. 


Sex Post Facto
Oct 23, 2017
What’s next.

ENCORE  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. 


Too Big to Prove
Oct 16, 2017
Gravitational waves, string theory, and modern physics

Celebrations are in order for the physicists who won the 2017 Nobel Prize, for the detection of gravitational waves.  But the road to Stockholm was not easy.  Unfolding over a century, it went from doubtful theory to daring experiments and even disrepute.  100 years is a major lag between a theory and its confirmation, and new ideas in physics may take even longer to prove.


On Defense
Oct 09, 2017
Protection strategies.

ENCORE  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.


It's In Material
Oct 02, 2017
New constructs in construction stuff.

Astronauts are made of the “right stuff,” but what about their spacesuits?   NASA’s pressurized and helmeted onesies are remarkable, but they need updating if we’re to boldly go into deep space.   Suiting up on Mars requires more manual flexibility, for example.  Find out what innovative materials might be used to reboot the suit.


Aliens - The Evidence
Sep 25, 2017
Make your best case.

ENCORE  Once again the aliens have landed … in theaters.  It’s no spoiler to say that the latest cinematic sci-fi, Arrival, involves extraterrestrials visiting Earth. 

But for some folks, the film’s premise is hardly shocking.  They’re convinced that the aliens have already come.  But is there any proof that aliens are here now or that they landed long ago to, for example, help build the Egyptian pyramids?

Meanwhile, SETI scientists are deploying their big antennas in an effort to establish that extraterrestrials exist far beyond Earth.


Angles of a Hack
Sep 18, 2017
Meet the modern hackers.

Changed your computer password recently?  We all try to stay one step ahead of the hackers, but the fear factor is increasing.  The risks can range from stolen social security numbers to sabotaging a national power grid. 


Plan of a Hack
Sep 11, 2017
Meet the original hackers.

Long before cyber criminals were stealing ATM passwords, phone phreaks were tapping into the telephone system. Their motivation was not monetary, but the thrill of defeating a complex, invisible network. Today “hacking” can apply to cyberwarfare, biological tinkering, or even geoengineering.  Often it has negative connotations, but the original definition of “hacking” was something else.


Born Legacy
Sep 04, 2017
We fly on NASA's SOFIA to discover how stars are born.

ENCORE  We know how the stars shine, but how do you make a star?  We take an all-night ride on a high-flying jet – an airborne NASA observatory called SOFIA – to watch astronomers investigate how a star is born. (Listen to the show in the player above, and read our reporter Emma Bentley's account of her adventure here.)


Elements Never Forget
Aug 28, 2017
Periodic appearances.

ENCORE  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.


Musical Universe
Aug 21, 2017
Sounds of silence.

ENCORE  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? 


On Thin Ice
Aug 14, 2017
Climate change as icebreaker.

Water is essential for life – that we know.  But the honeycomb lattice that forms when you chill it to zero degrees Celsius is also inexorably intertwined with life.

Ice is more than a repository for water that would otherwise raise sea levels.  It’s part of Earth’s cooling system … a barrier preventing decaying organic matter from releasing methane gas … and a vault entombing ancient bacteria and other microbes. 

From the Arctic to the Antarctic, global ice is disappearing.   Find out what’s at stake as atmospheric CO2 threatens frozen H2O. 


Adam Savage
Aug 07, 2017
But is it science?

ENCORE  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.”


Caught in a Traps
Jul 31, 2017
Volcanos and quakes.

ENCORE  “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.


What Goes Around
Jul 24, 2017
How to recycle nearly everything.

It’s not just tin cans and newspapers.  One man says that, from a technical standpoint, everything can be recycled – cigarette butts, yoga mats, dirty diapers.  Even radioactive waste.  You name it, we can recycle it.  But we choose not to.  Find out why we don’t, and how we could do more. 

Plus, a solar-powered device that pulls water from the air – even desert air. 

And, something upon which life depends that seems dirt cheap, but can’t be replenished: soil.  What happens when we pave over this living resource? 

Guests:


Eclipsing All Other Shows
Jul 17, 2017
Excitement builds for the 2017 solar eclipse.

They say that the experience of watching a total eclipse is so profound, you’re not the same afterward.  If life-changing events are your thing and you’re in the lower 48 states on August 21st, let us help you make the most of viewing the Great American Solar Eclipse.

Learn the basics of where to be and what to bring, even on short notice. No eclipse glasses?  Find out why a kitchen colander is an excellent Plan B.

Also, the strange behavior of animals and private jet pilots during an eclipse.  The latter is making the FAA sweat.


Frogs' Pants
Jul 10, 2017
Clever experiments to define and detect life.

It’s one of the most bizarre biological experiments ever. In the 18th century, a scientist fitted a pair of tailor-made briefs on a male frog to determine the animal’s contribution to reproduction.  The process of gestation was a mystery and scientists had some odd-ball theories.  

Today, a 5th grader can tell you how babies are made, but we still don’t know exactly what life is.  In our quest to understand, we’re still at the frogs’ pants stage.