Science Friday

Fridays 1 - 3 p.m.
  • Hosted by Ira Flatow

Science Friday is a weekly science talk show, broadcast live over public radio stations nationwide from 2-4 p.m. Eastern time. Each week, we focus on science topics that are in the news and try to bring an educated, balanced discussion to bear on the scientific issues at hand. Panels of expert guests join Science Friday's host, Ira Flatow, a veteran science journalist, to discuss science -- and to take questions from listeners during the call-in portion of the program.

To participate, call 1 (844) 724-8255 or Twitter users can tweet questions @scifri.

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AI-based fake videos pose the latest threat to what we perceive as reality — and possibly our democracy

2 hours ago

First, “fake news” from questionable news sites permeated social media during the 2016 presidential campaign. Now, behold the next trend in skewed reality that experts say could threaten US democracy: fake videos that appear authentic by embedding real people's faces onto other bodies through artificial intelligence algorithms. It has sparked a debate on how to verify videos shared online.  

This phenomenon also began during the presidential campaign. People began slicing videos to falsely make it look as if events took place.

The next time you're visiting a website and your computer’s fan starts going crazy out of nowhere, there could be nefarious activity behind it.

New study sheds light on the debate over the origins of flamingos in Florida

Mar 10, 2018

Florida. Flamingos. The alliteration rolls right off the tongue. Yet for years there has been a question raised about whether the birds are actually native to the Sunshine State — a situation that could have major implications for the management of the species.

The ozone hole over the Antarctic is beginning to fill up. Here's the bad news.

Mar 4, 2018

Before the term global warming entered our collective lexicon, environmentalists and scientists had expressed major concern over the depletion of the ozone, the layer of gas that protects the Earth from extremely harmful solar ultraviolet (UV) rays. 

This heightened awareness led to the international adoption of the Montreal Protocol in 1987, in which major restrictions were placed on products that contained chlorofluorocarbons (CFCs) — thought to be the biggest culprit in the matter.

Giant chocolate industry depends on tiny insects for survival

Mar 3, 2018

Chocolate is a global industry worth about $100 billion a year. What gets overshadowed in all those sweet treats and big profits are the bugs responsible for it all.

Yes, bugs.

Chocolate comes from cacao beans, which come from the tiny flower of the cacao plant. Those plants are pollinated by even smaller flies called biting midges. For years, the flies have been the focal point of research by Samantha Jay Forbes, a doctoral candidate in agriculture and environment at James Cook University in Australia.

A cure for the flu? It could be as simple as sitting under a lamp.

Feb 27, 2018

It’s an annual rite of fall and winter that everyone tries to avoid: flu season. This season, the influenza virus has been particularly brutal in the United States, claiming the lives of 84 children in the US alone.

A new study has recently come out could shed some new light — so to speak — on how to kill the flu bug before it has the ability to show up in your system.

Naked mole rats may not be the most attractive creatures on the planet, but what they lack for in looks, researchers say, they more than make up for in genetic wonders.

The list of biological anomalies tied to these small rodents is long and jaw-dropping. They include the ability to survive 18 minutes without oxygen, a practical immunity to cancer and Alzheimer’s and other diseases associated with aging. They also have the ability to live longer than any animal its size — up to 30 years.

In early November, Strava — a technology company that can track athletic activity for its users through its website and app — released an article on Medium that proudly announced its first major global “heat map” that the company had released since 2015.

The article contains a list of astounding numbers including a billion activities, three trillion latitude/longitude points, 13 trillion rasterized pixels, 10 terabytes of raw input data and 17 billion miles covered.

For years, China has been associated with dirty, smog-filled air — so much so that it has become custom for some hotels to give guests complementary masks. Recently, though, the country has started making large strides to clear the air.

It’s been said that music is a universal language. To a group of researchers who are mostly from Harvard University, it’s more than a trite saying: It's an idea that formed the basis of extensive work to get a better feel for that universality — regardless of cultures or geography.

Do songs share social functions around the world, such as being used to meet people at a dance, calm fussy infants or heal illness? Do they have convergent or contextual features such as the instruments being used, the gender of the singers or a similar melodic or rhythmic complexities?

How much do you know about jellyfish? OK, you might have been stung by one that one time on vacation in Florida, but what other information do you have?

The general public has based its relationship with the aquatic animals on fear. First, there is the fear of being stung — and now there is a growing concern that warmer waters caused by climate change will result in a surge in the creatures in waters worldwide

In spite of a request from the director of Centers for Disease Control (CDC) for Americans to get vaccinated, only 40 percent of the US population had received the flu vaccination by November.

Looking for a good night’s sleep? You’re not alone. More than a third of adults aren’t getting the recommended seven hours of sleep (never mind the ideal eight), according to a report from the Centers for Disease Control and Prevention (CDC) in 2014.

It’s one of the most famous cases of mistaken identity in the literary world: Frankenstein. When the name comes up, a majority of people think of a tall, green fellow with a flat head and bolts in his neck — an image that began with the original “Frankenstein” movie in 1910. Or you may think of the 1931 film with the title character played by Boris Karloff.

Predictive algorithms have been aiding us for years (see several of Google’s products, for instance) under the guise of making our lives easier by helping us make decisions.

But when do predictive algorithms cross the ethical line? Recently more jurisdictions at the state and local levels in the US have been buying software products from companies that use such algorithms along with data mining to make decisions that could have irreversible impacts on individuals and communities — such as determining jail sentences and predicting public policies.

As cold weather grips a majority of the country, it may be easy to think that all life is dead when the ground is frozen, at least until spring breathes new life into the plant systems and surrounding environments.

The signs have been there all along when it comes to using mechanical stimulation to stimulate regeneration and growth of tissue by simply pulling or pushing on cells. Think of a pregnant woman whose womb expands as the baby grows or a doctor telling a patient to lift weights to fight off osteoporosis by promoting bone growth.

How much do you know about the science that goes into making bourbon? One would think the citizens of Kentucky — the epicenter of the corn-based whiskey — would know more than the average Joe on the topic.

At a taping of PRI’s Science Friday with Ira Flatow earlier this year at the Brown Theatre in Louisville, two teams composed of local bourbon enthusiasts tried their luck at a few questions connected to the popular hard liquor. The teams’ names reflected two the most popular bourbon-based concoctions: Hot Toddy and Old Fashioned.

Get out and get some fresh air. This phrase has been uttered for decades in an attempt to promote the exercise of walking, which has always been thought to have health benefits for nearly everyone's cardiovascular system.

Scientists warn we may be creating a 'digital dark age'

Jan 2, 2018

You may think that those photos on Facebook or all your tweets may last forever, or might even come back to haunt you, depending on what you have out there. But, in reality, much of our digital information is at risk of disappearing in the future.

Unlike in previous decades, no physical record exists these days for much of the digital material we own. Your old CDs, for example, will not last more than a couple of decades. This worries archivists and archaeologists and presents a knotty technological challenge.