Episodes

Air Apparent
Oct 22, 2018
An atmospheric episode.

(Repeat) Whether you yawn, gasp, sniff, snore, or sigh, you’re availing yourself of our very special atmosphere.   It’s easy to take this invisible chemical cocktail for granted, but it’s not only essential to your existence: it unites you and every other lifeform on the planet, dead or alive.  The next breath you take likely includes molecules exhaled by Julius Caesar or Eleanor Roosevelt.


DNA is Not Destiny
Oct 15, 2018
How behavior can change genes

Heredity was once thought to be straightforward.  Genes were passed in an immutable path from parents to you, and you were stuck – or blessed – with what you got.  DNA didn’t change. 

But now we know that’s not true.   Epigenetic factors, such as your environment and your lifestyle, control how your genes are expressed.  Meanwhile, the powerful tool CRISPR allows us to tinker with the genes themselves.  DNA is no longer destiny.


Creature Discomforts
Oct 08, 2018
Our animal prejudices corrected.

Okay you animals, line up: stoned sloths, playful pandas, baleful bovines, and vile vultures.  We’ve got you guys pegged, thanks to central casting. 

Or do we?  Our often simplistic view of animals ignores their remarkable adaptive abilities.  Stumbly sloths are in fact remarkably agile and a vulture’s tricks for thermoregulation can’t be found in an outdoors store. 


Wonder Women
Oct 01, 2018
Challenging science culture

(Repeat) 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: Heal Thyself
Sep 24, 2018
Do we still need doctors?

Do we still need doctors?  There are umpteen alternative sources of medical advice, including endless and heartfelt health tips from people without medical degrees. Frankly, self-diagnosis with a health app is easier and cheaper than a trip to a clinic.   Since we’re urged to be our own health advocate and seek second opinions, why not ask Alexa or consult with a celebrity about what ails us?

Find out if you can trust these alternative medical advice platforms.  Plus, lessons from an AIDS fighter about ignoring the findings of medical science.  


DNA: Nature's Hard Drive
Sep 17, 2018
What surprises are in storage?

(Repeat) 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.”


Angles of a Hack
Sep 10, 2018
Meet the modern hackers.

(repeat) 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 03, 2018
Meet the original hackers.

(Repeat)  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.


Aug 27, 2018
Will we rise to the challenge of a rising sea level?

The seas are rising.   It’s no longer a rarity to see kayakers paddling through downtown Miami.  By century’s end, the oceans could be anywhere from 2 to 6 feet higher, threatening millions of people and property.  But humans once knew how to adapt to rising waters.  As high water threatens to drown our cities, can we learn do it again.


Too Big to Prove
Aug 20, 2018
Gravitational waves, string theory, and modern physics

(Repeat) 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.


It's Habitable Forming
Aug 13, 2018
Possible gamechanger: a subsurface lake on Mars.

There’s evidence for a subsurface lake on Mars, and scientists are excitedly using the “h” word.  Could the Red Planet be habitable, not billions of years ago, but today?  While we wait – impatiently – for a confirmation of this result, we review the recipe for habitable alien worlds. For example, the moon Titan has liquid lakes on its surface.  Could they be filled with Titanites?

Dive into a possible briny, underground lake on Mars … protect yourself from the methane-drenched rain on a moon of Saturn … and cheer on the missed-it-by-that-much planets, asteroids Ceres and Vesta.


Skeptic Check: Brain Gain
Aug 06, 2018
Separating pseudo from science in cognitive enhancement.

Looking to boost your brainpower?  Luckily, there are products promising to help.  Smart drugs, neurofeedback exercises, and brain-training video games all promise to improve your gray matter’s performance.  But it’s uncertain whether these products really work.  Regulatory agencies have come down hard on some popular brain training companies for false advertising. But other brain games have shown benefits in clinical trials.  And could we skip the brain workout altogether and pop a genius pill instead? 


It's In Material
Jul 30, 2018
New constructs in construction stuff.

(Repeat) 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.


Identity Crisis
Jul 23, 2018
The search for the ultimate biomarker.

DNA is the gold standard of identification.  Except when it’s not.  In rare cases when a person has two complete sets of DNA, that person’s identity may be up in the air.  Meanwhile, DNA ancestry tests are proving frustratingly vague: dishing up generalities about where you came from rather than anything specific.  And decoding a genome is still relatively expensive and time-consuming.   So, while we refine our ability to work with DNA, the search is on for a quick and easy biomarker test to tell us who we are.  


On Thin Ice
Jul 16, 2018
Climate change as icebreaker.

ENCORE  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. 


What Goes Around
Jul 09, 2018
How to recycle nearly everything.

ENCORE  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:


Frogs' Pants
Jul 02, 2018
Clever experiments to define and detect life.

ENCORE  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.


Free Range Dinosaurs
Jun 25, 2018
When dinosaurs ruled.

Dinosaurs are once again stomping and snorting their way across the screen of your local movie theater.  But these beefy beasts stole the show long before CGI brought them back in the Jurassic Park blockbusters.  Dinosaurs had global dominance for the better part of 165 million years. Compare that with a measly 56 million years of primate activity. We bow to our evolutionary overlords in this episode.  


Perpetual Emotion Machine
Jun 18, 2018
Compassionate computers and irrational human behavior.

ENCORE  Get ready for compassionate computers that feel your pain, share your joy, and generally get where you’re coming from.  Computers that can tell by your voice whether you’re pumped up or feeling down, or sense changes in heart rate, skin, or muscle tension to determine your mood.  Empathetic electronics that you can relate to.


Skeptic Check: Flat Earth
Jun 11, 2018
Scientific vs science-like investigations.

The Earth is not round.  Technically, it’s an oblate spheroid.  But for some people, the first statement is not even approximately correct.  Flat Earthers believe that our planet resembles – not a slightly squashed grapefruit – but a thick pancake.   A journalist who covered a Flat Earth convention describes the rationale behind this ever-more popular belief. 

So how do you establish science truth?  We look at the difference between a truly scientific examination of extraordinary claims and approaches that feel and look science-y but aren’t.