School told you the truth as of that year.

Taught'Ain't' ain't a word. It is not in the dictionary, it marks you as uneducated, and using it in writing is an error.

NowIt has been in dictionaries for centuries and is labelled nonstandard. Webster's Third New International Dictionary included it without condemnation in 1961 and caused a national scandal. It originated as a perfectly respectable contraction used by the English upper class.

TaughtOnly about 2% of the genome codes for proteins. The rest is evolutionary debris: junk DNA with no function.

NowMuch of the noncoding genome regulates when and where genes switch on. The ENCODE project reported in 2012 that most of the genome is biochemically active, though how much is genuinely functional is still fiercely argued.

TaughtSoftware can edit, filter, and rearrange existing pictures, but it cannot invent a new image from scratch. Describe 'an astronaut riding a horse in the style of a Renaissance painting' and no program could produce it — visual creativity is human.

NowIn 2022, text-to-image models made this routine. OpenAI released DALL·E 2 in April, and Stable Diffusion was released openly in August — systems that generate novel, coherent, high-resolution images from a plain-English prompt in seconds.

TaughtModerate drinking is healthier than not drinking at all. A glass of red wine a day protects your heart — the famous J-shaped curve, backed by the 'French paradox.'

NowIn January 2023 the WHO stated plainly that no level of alcohol consumption is safe for health, and better-controlled studies have shown the apparent benefit of moderate drinking largely dissolves once confounding is removed. Alcohol is a Group 1 carcinogen.

TaughtUranus rotates once every 17 hours and 14 minutes. Voyager 2 measured it during its 1986 flyby by timing the planet's radio emissions and magnetic field, and that has been the figure ever since.

NowIn April 2025, using a decade of Hubble observations of Uranus's auroras, astronomers pinned the rotation period at 17 hours, 14 minutes and 52 seconds — about 28 seconds longer than Voyager's value, and a thousand times more precise.

TaughtMedicines work by binding a target protein and blocking it, like a key jammed in a lock. The drug has to stay bound to keep working, and proteins the body considers 'undruggable' — with no good pocket to grab — are simply out of reach.

NowOn 1 May 2026 the FDA approved vepdegestrant (Veppanu), the first PROTAC ever authorized anywhere. Instead of blocking its target, it tags the protein for the cell's own disposal machinery, so the protein is destroyed rather than merely occupied.