ACE (Advisory Centre for Education) Things of Science, Kit 9, 1966.

Chandrayaan 3 on the moon. Go babbbbbyyyyy. ISRO 🥰🥰🥰

Imagine an alien sharing a cool human fact they just learned like ”hey guys did you know that the silvery markings on humans actually aren’t true stripes? They’re called stretch marks, they happen when the human is growing fast enough to actually outgrow their skin, which is apparently something that just fucking happens to almost all of them at some point of their life.”

and another one is like ”wait so you’re saying humans don’t have stripes.”

”actually they do, but the stripes are invisible. There’s genetic code that’d give them stripes but they’re just the same colour as the rest of the skin. So the visible stripes are not real stripes and the real stripes are invisible.”

”I swear if you tell me one more weird human thing today I’m beating your ass.”

The human in the room looks up and goes "Wait I have stripes?"

"what do you mean cats can see them, but I can't?"

what do you fucking mean cats can see them

I WENT THROUGH THE SAME THOUGHT PROCESS

MY CAT THINKS I HAVE STRIPES?!?!?!?

NO NO ITS NOT "IT THINKS I HAVE THEM"

BECAUSE WE DO APPARENTLY

SO ITS ACTUALLY A VERY DISTRESSED "MY CAT THINKS I KNOW I HAVE STRIPES?!?!?!"

AND I THINK THATS A BIT WORSE TO BE COMPLETELY HONEST

MY CAT KNEW I HAD STRIPES BEFORE I DID?!?!?!?!?!?

I DIDNT THINK OF THAT

WELL I DID AND NOW I CANT UNTHINK IT

@beenovel @messiambrandybuck these are the variants

WHAT

apparently there's a disease where they become visable, and these are the most common kind??

Ngl it looks cool but???? I'm still in shock tbh

I NEED TO KNOW WHAT PATTERN OF STRIPES I HAVE AND THE CATS WON'T TELL ME

I COULD HAVE A CHECKERBOARD ON MY BACK AND NO ONE WOULD KNOW???

They’re called Blaschko's lines!!!

The reverse can also be true ... kinda.

I remember reading somehwre the human eye can see more shades of green than any other colour. I just googled it and the human eye can see 10 Million different shades of green.

So human could see stripes and patterns on, say, a reptillian race who maybe can’t see as many colours as we do, and think they’re just one boring shade of green.

Human: We have stripes?! I wish I could see them. I hope they look like yours.

Reptile Alien: Wait, I HAVE STRIPES!

*mutual excitement all around*

Camillo Golgi and Santiago Ramón y Cajal

Early Illustrations of the Nervous System late 1800s

Berenice Abbott, Interference of Waves

To give some perspective: Chariots were invented circa 2000 BC and were the fastest form of transportation known to man for around 3800 years until trains in the 1800′s. Then 100 years later we were flying, and 66 years after that we were on the Moon.

Mamluck silver and brass astrolabes, signed Muhammad Zaman Al-Munajim Al-mas, Syria 1351

Oscilloscope settings. Sound Waves In Air. Educational Services Inc. 1961.

Internet Archive

Shadowgraph of shock wave diffraction around a triangular obstacle taken in an air shock tube (Courtesy German-French Research Institute, St. Louis, ISL). Source

Our friend the atom

Fundamentals of Acoustics, 1950s

William Bragg, (1925), Concerning the Nature of Things, Dover Publications, Inc., New York, NY, 1948