A neutron star compresses something like 1.4 solar masses — roughly 2.8 × 10^30 kilograms — into a sphere about 20 to 24 kilometers across.
A wedding ring weighs a few grams. The gold in it has been mined, refined, alloyed, cast, polished, and fitted.
The familiar comparison runs like this: there are more stars in the observable universe than grains of sand on every beach on Earth, a fact wheeled out in…
The line that you are made of stardust is true, and it is also one of the most efficiently flattened facts in popular science.
Carl Sagan used to walk his Cornell students through a thought experiment he called the Cosmic Calendar, and the version he sketched on a chalkboard in the late 1970s is still the cleanest way to make 13.8 billion years sit inside a human skull.
When the Soyuz hatch opens on the Kazakh steppe or a Crew Dragon splashes down in the Pacific, the people inside are not expected to stand.
On the evening of 16 May 2026, the Swedish Women's Educational Association announced the recipient of Årets Svenska Kvinna, its annual Swedish Woman of the Year award.
A wild crow that has never seen you, never been trapped by you, never been harassed by you, can still recognize your face and scream at you from a tree because its parents told it to.
What would it take to convince you that a four-inch shrimp can punch with the acceleration of a bullet, boil seawater on contact, and perceive a slice of the electromagnetic spectrum that your brain has no architecture to process?
The standard mental model of an animal goes like this: there is a brain at the top, the brain decides what the body does, and the body executes.
Don Gurnett, the principal investigator for the Radio and Plasma Wave Science instrument on NASA's Cassini spacecraft, spent decades turning the electromagnetic noise of the outer planets into something a human ear could parse.
The sunlight hitting your eyes right now left the sun's surface about eight minutes ago.
The satellites that helped map where 170 trillion pieces of plastic are concentrated in our oceans weren't built to look for plastic at all.
Buzz Aldrin took communion inside the lunar module during the rest period between landing and the EVA, which occurred roughly six and a half hours after…
The Parker Solar Probe is currently orbiting the Sun at roughly 430,000 miles per hour, a velocity that would carry it from the Atlantic to the Pacific coast of the United States in about twenty seconds.
The Hubble Space Telescope went into orbit in April 1990 with a primary mirror polished to the wrong shape by 2.2 micrometers, a figure smaller than a fiftieth…
