We take on a challenging vending machine puzzle, breaking down the strategy and clever mechanics behind its creative solution. Lisa Phillips was in her twenties when she went to Jeffrey Epstein’s ...

One idle evening last October, Mehtaab Sawhney took up an old pastime. He began perusing the website erdosproblems.com, an updated record of the 1,179 conjectures left behind by the eccentric and ...

So, you’ve got a HackerRank test coming up, huh? It’s pretty common these days, with lots of companies using it to see if you can code. It can feel a bit daunting, but honestly, it’s just another ...

H ave you ever met a Zionist Foucauldian? Some 30 years ago, I half-jokingly asked my fellow graduate students in a social-theory course if they had ever encountered such a creature. No one had. The ...

Elizabeth Guevara is a personal finance reporter who explains the world of business and economics and how it impacts your finances. She joined Investopedia in 2024. Kobus Louw / Getty Images ...

Dr. Toyin Ajayi has an ambitious mission: to make health care accessible to all. Ajayi is the founder and CEO of Cityblock Health, a primary care provider focused on helping underserved communities in ...

In the weeks since the October 8 cease-fire between Israel and Hamas, establishing and maintaining security in Gaza has become a crucial test. Already in the days after the deal was announced, Hamas ...

In 1945, as the first atomic bomb exploded in the New Mexico desert, Enrico Fermi stood miles away, holding a few scraps of paper. As the shockwave rolled toward him, he dropped the papers and watched ...

Elliot Varoy does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond their ...

We meet a solutions architect who tells us that his defining characteristic is curiosity, and that for him success is in solving problems with technology, for people. In a recent episode of the First ...

Professor of Law and Associate Dean for International Affairs, Wake Forest University While U.S. and global solutions seem far off, policies to limit harm from microplastics are gaining traction at ...

Microplastics seem to be everywhere—in the air we breathe, the water we drink, the food we eat. They have turned up in human organs, blood, testicles, placentas and even brains. While the full health ...