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Vision – How the Eye Builds a Picture
The sharp, seamless, full-colour picture you seem to be looking at right now isn't a direct recording of the world — it's a construction, built by yo…
2 months, 1 week ago
Titan – The Moon with Rivers of Methane
Saturn's largest moon looks almost like a distant cousin of early Earth: a thick atmosphere, rivers, lakes, rain and genuine weather. But every drop …
2 months, 1 week ago
Sea Level Rise – Why It Isn't the Same Everywhere
In some coastal cities, ordinary high tide on a clear, calm, cloudless day is now enough to send seawater bubbling up through the drains and into the…
2 months, 1 week ago
Crystals – Order Inside Solids
Tip a little table salt onto a dark plate and look closely, with a magnifying glass if you have one, and you'll find that every single grain is a tin…
2 months, 2 weeks ago
The Kidneys – The Body's Filtration Plant
Every single day, without you noticing or doing anything at all, roughly 180 litres of fluid are filtered out of your blood, checked over in extraord…
2 months, 2 weeks ago
Nebulae and Star Clusters – Where Stars Are Born
That faint, fuzzy smudge hanging below the three stars of Orion's belt isn't a star at all — it's a cloud of gas and dust several light years across,…
2 months, 2 weeks ago
Glaciers and Ice Sheets – Rivers of Ice
A glacier looks like the stillest thing on Earth, and yet it is quietly flowing, carving valleys and fjords, and preserving an extraordinarily detail…
2 months, 3 weeks ago
States of Matter – Solid, Liquid, Gas and Beyond
An ice cube melting in a glass of water quietly demonstrates one of the most fundamental ideas in all of physics and chemistry: matter changing betwe…
2 months, 3 weeks ago
Hormones – The Body's Chemical Messengers
The flutter before a big moment, the sleepiness that arrives as the room dims, the steady pull of blood sugar back to normal after a meal — none of i…
2 months, 3 weeks ago
Cosmic Rays – Messengers from Violent Space
Every second, invisible high-speed particles born in the deaths of distant stars — and possibly in sources far more extreme still — are raining down …
2 months, 4 weeks ago