Technology

Hummingbirds Can See Colors We Can’t Even Imagine

When humans see purple, we’re really seeing a blend of red and blue light. Hummingbirds see purple plus ultraviolet—and lots of other...

How Masks Went From Don’t-Wear to Must-Have During the...

Public health messaging and science have to work hard to stay in sync during a crisis. During the Covid-19 pandemic, they haven’t...

Your Firework Smoke Could Be Tainted With Lead

It may be the most unpatriotic toxicology study ever, but so be it: Metals give fireworks their color, but some manufacturers are...

Where Should Covid-19 Vaccines Be Tested? It's a Moving...

Developers need to test in hotspots, but those keep changing. And they must avoid ethical problems, like testing in low-income areas...

The CEO of Novartis on Developing Drugs During a Pandemic

Vas Narasimhan talks about drug prices, vaccine development, the rise and fall of hydroxychloroquine, and how Big Pharma might win...

Nuclear ‘Power Balls’ May Make Meltdowns a Thing of the...

Triso particles are an alien-looking fuel with built-in safety features that will power a new generation of high-temperature reactors.

NASA’s New Moon-Bound Space Suits Will Get a Boost From...

Engineers are turning to generative design algorithms to build components for NASA’s next-generation space suit—the first major update...

The Anthropause: How the Pandemic Gives Scientists a New...

A group of scientists argue that the Covid lockdown, what they're calling the “anthropause,” is an unprecedented opportunity to study...

In Lockdown, Mathematicians Crack a Stubborn Geometry Riddle

The rectangular peg problem asks a seemingly simple question: Does a closed loop include the corners of every kind of rectangle?

The Debate Over Burning Dead Trees to Create Biomass Energy

Critics worry about the risks of overcutting and wood smoke. But supporters say the practice will prevent megafires—which release...