Marcio Aleksandravicius

The Logarithmic Spiral Gears is an extreme example of non-circular gear sets.

It's based on the famous Fibonacci spiral and evokes the cross section of a nautilus shell with internal chambers

Crown shyness is a phenomenon where the top branches of neighboring trees avoid touching to stay safe, leaving visible jigsaw like gaps between their crowns.

The literal meaning of copycat

Nothing special to see, just an army of piglets queuing up to dive.

Each sphere is moving in a straight line, but the final motion is circular

People who say math is painful

How the keystone locks an arch together using compression, an ancient design still standing today.

Nailed it!

The fountain that shows date and time.

Czech Republic.

Onbashira, the 1,200-year-old festival that happens in the deep mountains of Japan.

In China they make denim from Abaca banana stalks from the Philippines.

Whole process was mesmerizing! 😳

That fresh smell after rain is called petrichor.

When raindrops hit dry soil, they release plant oils and geosmin from bacteria, creating that rich, earthy scent.

Tomás Vega invented a MouthPad, a groundbreaking device that enables people with paralysis to control digital devices using tongue, mouth, and head gestures.

Crocodile's eyes are an engineering marvel: They are protected by a third eyelid, can track different targets, are retractable in battle, and can even see at night.

📽: Smithsonian Channel

When the TV Turns Off but the Dance Party Isn’t Over 🐶🤣

Pure love in those eyes..🐈🐾😊❤️

A starfish walking on a beach.

📽: Zeb Hallock

A demonstration of Pascal's Law in action 🫡

This window creates privacy using sand and natural gravity

How light behaves with different lenses

Owls are just bird hardware running cat software

Human three-dimensional ball

The fact that the bird instinctively builds this complex nest to mislead predators and hides its eggs deep inside for safety is fascinating.

Have you ever seen rice growing?

This 16-day timelapse shows you what happens to a grain of rice in water.