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May 2, 2025
An astronomer explores the cosmos and the limits of what science can test. Plus, how the mysterious properties of pasta—like how it bends, coils, and breaks—have been tested by physicists for decades. And, millions of years ago, iguanas somehow got from North America to Fiji. Scientists think they made the trip on a raft of fallen vegetation.
14:16
With Rising Temperatures, Infrastructure Falters
Hot weather means more than just sweaty brows and a yearning for the pool.
7:51
Can White Blood Cells Spread Cancer?
Researchers say they may have found a new way that cancer spreads.
7:47
Writing Tunes to Tune In To
A behind-the-notes look at the creation of Science Friday’s new theme music.
9:59
Building a Liver From Stem Cells
Researchers say they have created a functional human liver using induced pluripotent stem cells.
29:05
Is Alternative Medicine Really ‘Medicine’?
In his new book, Paul Offit writes that many alternative treatments are unproven, or worse, harmful.
17:17
Not One, but Three ‘Goldilocks Planets’?
In a nearby solar system, astronomers say they found three planets that could support life.
29:35
‘Brainwashed’ Examines the Value of Brain Scans
What, if anything, can brain scans reveal about the mind at work?
5:43
Living Large in 140 Square Feet
Chris Tack made seven unloading trips to Goodwill before moving into the tiny home he and his wife Malissa designed and built.
28:50
Aiming For ‘Wild and Crazy’ Energy Ideas
The Advanced Research Projects Agency-Energy backs risky ideas that may offer a huge energy payoff.
12:20
Obama: U.S. Should Lead Assault on Climate Change
Without cooperation from Congress, President Obama has proposed his own plan for climate change.