Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Vikki Velasquez is a researcher and writer ...

Christopher Nolan’s Interstellar created a black hole that would later turn out to be fairly scientifically accurate.

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

This neo-Gothic cathedral may catch your eye with its enormous spires and you'll hear it referred to by many (similar) names, including Catedral da Sé, Catedral Metropolitana and Catedral da Sé de São ...

A cease-fire is mostly holding, But tough issues remain, including the fate of Hamas weapons. One of the hardest things about covering the war in Gaza is that Israel does not allow any journalists in, ...

The best time to visit São Paulo is from March to May or October to November (the fall and spring shoulder seasons) when the temperatures are comfortable, the city sees less precipitation (and less ...

"Dark photon" theory says light's interference patterns may emerge from quantum particles, not waves, upending centuries of ...

Much of 2025 felt like an unfortunate detour from the real work the global coffee industry cannot keep postponing: making ...

"Dark photon" theory says light's interference patterns may emerge from quantum particles, not waves, upending centuries of ...

Describing matter under extreme conditions, such as those found inside neutron stars, remains an unsolved problem. The density of such matter is equivalent to compressing around 100,000 Eiffel Towers ...

Manufacturing plants, utilities and energy operations consume a lot of MRO products and critical parts. A lot of it sits on shelves or disappears out the “back door into a swamp,” per the observations ...

Oscar Piastri's hopes of winning the F1 title suffered a hammer blow after McLaren's strategy error in Qatar, but there is still hope. Here's how the Aussie can upset ...