Switzerland didn’t avoid its mountains, it engineered straight through them. Trains climb slopes steeper than most buildings, carrying residents, workers, and tourists every day. These systems aren’t ...

Dr. James McCaffrey presents a complete end-to-end demonstration of linear regression with pseudo-inverse training implemented using JavaScript. Compared to other training techniques, such as ...

National security, unlocked. Each Thursday, host Mary Louise Kelly and a team of NPR correspondents discuss the biggest national security news of the week. With decades of reporting from battlefields ...

In The Descent, an outdoor adventure goes terribly wrong for six friends who enter caves looking for fun but find murderous creatures within the depths. Jen Karner has spent the last 10 years covering ...

New York City is the sort of place most people might feel familiar with even if they’ve never been there since it shows up in ...

Indicator species are living organisms that tell us that something has changed or is going to change in their environment. They can be easily observed, and studying them is considered a cost-effective ...