Solution to Feynman's reverse sprinkler puzzle also applies to "silly sprinklers"

New study confirms 2024 "momentum flux theory" on how angular momentum of water flows drives rotation. [...]

Space Mirror: The FCC Just Approved a Sun-Reflecting Satellite, and Astronomers Are Unimpressed

For now, a single satellite has been cleared for a test demonstration, but the company making it hopes to eventually launch 50,000 of them into orbit. [...]

The US Approves the Launch of a Mirror Satellite That Can Reflect Sunlight and Illuminate the Earth at Night

The FCC authorized Reflect Orbital to launch the mirror satellite Eärendil-1. “For optical astronomy, this poses an existential threat,” the European Southern Observatory said. [...]

What's the difference between active noise canceling and passive?

The frustrating science of keeping your ears from doing their job. [...]

New York Governor Signs First Statewide Data Center Moratorium

“We have no choice but to address the challenges created by these massive facilities,” New York’s governor Kathy Hochul said. The executive order will pause construction for one year. [...]

These painted e-tattoos could be the future of wearable biosensors

Conductive ink is painted directly onto the skin in colorful custom designs, drying into working electrodes. [...]

Mirrors in Space? The FCC Just Approved a Sun-Reflecting Satellite, and Astronomers Are Worried

For now, a single satellite has been cleared for a test demonstration, but the company making it hopes to eventually launch 50,000 of them into orbit. [...]

15 things science says about friendship and what it does to your health

From immune function and blood pressure to brain scans and life expectancy, here is what researchers have found about the ways friendship shapes the body [...]

The Apple FaceID Co-Inventor Building a Frontier AI Model for the Human Brain

Gidi Littwin's new AI startup, Hemispheric, makes diagnostic brain scans for conditions like depression, PTSD, and Parkinson’s. He wants the technology to be as cheap and easy as a blood test. [...]