Unbelieving

A man finds himself sucked into an intense head-to-head running competition against a perfect rival – all for free burritos from Chipotle. (18 minutes)

At the age of 17, competitive swimmer Lynne Cox had already accomplished a lot in the open ocean.

An incredibly accomplished 25-year-old, two-time Olympic boxing gold medalist Claressa Shields, achieved a big dream of hers this year.

David Kestenbaum desperately wants to set the record straight for everybody about whether aliens regularly visit earth.

Senior Editor David Kestenbaum talks with a different kind of advocacy group: animal scientists doing their best to save a particular species before it winks out of existence. (16 minutes)

Senior editor David Kestenbaum helps his kids set up an ant farm.