WORLD IN A DAY · THURSDAY, SEPTEMBER 3, 2026 Six stories worth five minutes: Nvidia makes its biggest acquisition ever, a UN report concedes the world’s flagship climate target will likely be missed, and a Bronze Age Egyptian official’s tomb resurfaces after four thousand years underground. Technology Nvidia to Buy Hugging Face for $12.9 Billion […]
A firefly blinking in a summer backyard and an anglerfish dangling a lure in the pitch-black deep sea are doing the exact same trick: making their own light. So why do some animals glow in the dark? It comes down to a chemical reaction called bioluminescence, and animals have evolved to use it for everything
Bioluminescence lets fireflies find mates and anglerfish lure prey — all from the same chemical trick.
The ocean covers most of the planet, but its depth is easy to underestimate. So how deep is the ocean, really? On average, it’s about 3,682 meters — roughly 12,080 feet, or more than two miles down, according to NOAA. But that number hides an enormous range, from shallow continental shelves you could wade into
From the sunlit surface to the crushing dark of the Challenger Deep, the ocean's average depth alone is more than two miles.
Stand in the right spot after a storm, with the sun at your back and rain still falling ahead of you, and you’ll see it: a perfect, glowing arc stretching across the sky. But why are rainbows curved rather than straight, or shaped like something else entirely? The answer comes down to simple geometry —
Every rainbow is really a full circle in the sky — the ground is what turns it into the arc we see.
Every autumn, a handful of animals pull off one of the strangest tricks in biology: they shut their bodies down almost to the point of death, then flip the switch back on months later with no apparent harm. So how do animals hibernate, exactly? The short answer is that true hibernators reduce their metabolism, heart
From supercooled squirrels to lightly dozing bears, hibernation is really a spectrum of extreme metabolic slowdowns.
Roughly 1,350 volcanoes around the world are considered potentially active, and about 500 of them have erupted in just the last century, according to the U.S. Geological Survey. That is a lot of mountains built from the inside out. Every one of them, from a snow-capped stratovolcano in the Cascades to a lava-spitting island in
From colliding plates to stationary hotspots, here is the geology behind where volcanoes form and why they erupt so differently.
On a clear, dark night at high latitude, the sky can suddenly start to move: ribbons of green, sometimes edged in pink or purple, rippling overhead like a curtain in the wind. The aurora borealis looks otherworldly because, in a sense, it is. What you are seeing is the tail end of a journey that
The aurora is solar wind, Earth's magnetic field, and 44-million-mile-per-hour electrons colliding, all lighting up the sky.
Every spring and fall, an invisible river of birds flows across the sky. On a good autumn night over the United States, an estimated one billion birds can be airborne at once, most of them traveling after dark when the air is calmer and predators are fewer. They are not fleeing the cold, at least
Billions of birds fly thousands of miles each year, guided by daylight, hunger, and a compass built into their own eyes.
A jar of honey looks simple: golden, sweet, shelf-stable for years. What it took to get there is anything but. Making honey requires a relay of dozens of bees, a body part built like a second stomach, an enzyme that rewrites sugar at the molecular level, and thousands of tiny wingbeats working as a dehumidifier.
It takes a relay of bees, one wild enzyme, and thousands of fanning wings to turn flower nectar into honey.
Stand at the edge of the sea on a clear day and the water looks like liquid sky, a deep, saturated blue stretching to the horizon. It is tempting to assume the ocean is simply mirroring the color above it. But scoop a glass of that same water and it comes out perfectly clear. The
The sea isn't mirroring the sky. It's the physics of water itself that paints the ocean blue.