In 1947, Harvard’s Mark II ran on roughly 13,000 electromechanical relays, stored numbers across 100 registers, and read instructions from punched paper tape, turning thousands of clicking metal switches into a Navy calculator vulnerable to dust, loose contacts, and one famously misplaced moth

The famous moth in the Harvard logbook is often told as the origin of the word “bug” in computing. The truth is more interesting: the joke only works because engineers had already been calling faults bugs for more than sixty years.

When you tilt a smartphone, gravity shifts microscopic silicon fingers inside its accelerometer by only a few nanometres, changing the capacitance between them and producing the electrical imbalance the phone reads as a new direction for down

Every smartphone contains a silicon structure smaller than a grain of rice that senses gravity by measuring how far a comb of tiny fingers moves when you tilt the device. The distances involved are a few nanometres — smaller than a strand of DNA.

Subscribe to our newsletter!

Our latest tutorials delivered straight to your inbox

The retina of the mantis shrimp carries 16 types of colour receptor to the human eye's three — and yet experiments suggest it sees colour worse than we do, using the extra channels for speed instead of subtlety

The retina of the mantis shrimp carries twelve types of colour receptor to the human eye’s three — and yet experiments suggest it sees colour worse than we do, using the extra channels for speed instead of subtlety

A bolt of lightning heats the air around it to roughly 30,000 kelvin — about five times hotter than the surface of the Sun — which is why the channel explodes outward and we hear thunder

When a lightning return stroke heats a channel only centimetres wide to roughly 30,000 kelvin, about five times the temperature of the Sun’s visible surface, the air expands so violently that the pressure wave rolls across the ground as thunder

In October 1957, a beachball-sized aluminium sphere called Sputnik 1 began sending 0.3-second pulses on two radio frequencies from orbit, signals amateur operators around the world could receive, making the space age suddenly audible from Earth

Roughly 99 per cent of international internet traffic runs through about 550 undersea cables — and a handful of private companies including Google, Meta and Amazon now own or lease a growing share of them

Content and cloud networks now account for three-quarters of used international bandwidth, while Google, Meta, Microsoft and Amazon own, co-own or buy capacity on a growing share of the 600-plus submarine cable systems carrying over 99 per cent of data between countries, a private map hidden below the wireless internet

Cool a ceramic made of yttrium, barium and copper oxide to 93 kelvin and it will levitate a magnet indefinitely — the 1986 discovery that finally pushed superconductors above the temperature of liquid nitrogen

In 1987, a year after the breakthrough that revived high-temperature superconductivity, physicists cooled a ceramic of yttrium, barium and copper oxide to 93 kelvin and watched it levitate a magnet indefinitely — the first superconductor cold enough to run on liquid nitrogen instead of scarce, expensive helium

GPS satellites tick about 38 microseconds a day faster than clocks on Earth — a relativistic drift Einstein predicted, and one the system corrects every orbit, or your location would drift 10 kilometres off within 24 hours

GPS satellites tick about 38 microseconds a day faster than clocks on Earth — a relativistic drift Einstein predicted, and one the system corrects every orbit, or your location would drift 10 kilometres off within 24 hours

Every year about 27.7 million tonnes of Saharan dust cross the Atlantic on the trade winds, and NASA's CALIPSO satellite has traced it fertilising the Amazon with roughly the same quantity of phosphorus the rainforest loses to rivers

Every year about 27.7 million tonnes of Saharan dust cross the Atlantic on the trade winds, and NASA’s CALIPSO satellite has traced it fertilising the Amazon with roughly the same quantity of phosphorus the rainforest loses to rivers

Your SSD doesn't forget files the way a hard drive does — it uses a background process called TRIM that actively wipes deleted blocks, which is why undelete tools rarely work on modern laptops

Your SSD doesn’t forget files the way a hard drive does — it uses a background process called TRIM that actively wipes deleted blocks, which is why undelete tools rarely work on modern laptops

A Greenland shark caught in 2016 was carbon-dated to roughly 400 years old, meaning it was already swimming the Arctic when Shakespeare was writing Hamlet — and biologists still can't explain how its cells resist ageing
Next >

Affiliate Disclosure: Make Tech Easier may earn commission on products purchased through our links, which supports the work we do for our readers.