Science Friday® is produced by the Science Friday Initiative, a 501(c)(3) nonprofit organization.

Science Friday® and SciFri® are registered service marks of Science Friday, Inc. Site design by Pentagram; engineering by Mediapolis.

Steven Strogatz

Researchers found that potentially 95 percent of cab rides in New York City could have been shared.

cab sharing, steven strogatz

As we celebrate Pi Day, mathematician Steven Strogatz talks about how the ancients calculated pi—and how you can do it at home.

mathematician, Steven Strogatz, pi, pi day, irrational number, greek number

Did you know some infinities are bigger than others? Or that one is equal to .99999999999 repeating? Just a few of the math mysteries in *The Joy of X*, a new book by Steven Strogatz.

math, algebra, steven strogatz, stephen strogatz, counting, numbers, infinity

Did you know some infinities are bigger than others? Or that one is equal to .99999999999 repeating? Just a few of the math mysteries in *The Joy of X*, a new book by Steven Strogatz.

mathematics, math, numbers, steven strogatz, the joy of x

What are the odds? How are we connected? And does it all add up? Steven Strogatz, professor of applied mathematics, joins us to run the numbers.

math

Chances are you've heard of the 'small world' idea of six degrees of separation. But is it correct?

small worlds, six degrees, kevin bacon

Cetacean Science

- Ancient Whale Relative Gave Birth on Land
Fossil remains of an ancient pregnant whale suggest that the animal gave birth ...

- A Researcher Asks: Are Dolphins Self-Aware?
Psychologist Diana Reiss discusses communication and cognition in dolphins.

- Blue Whale Barrel Roll Caught on Camera
Biologists are using data tags and a National Geographic Crittercam to study the...

- Dolphins and Comparative Medicine
What happens when a dolphin catches a cold? No, it's not a trick question. In th...

- Video Pick: Blowing Bubble Nets
Underwater digital tags show humpback whales use bubbles to trap schools of fish...