Sirens

What happens when the amount of vacuum increases and the atmospheric pressure on the outside of the tank is no longer balanced by pressure inside the tank, causing the tank walls to collapse.

How does a medical staple work?

[🎞️ Zack D. Films]

Noise cancellation explained

[🎞️ know. art.aldo]

Ultra clean water

Can helium make backpack easier?

[📹 OutsideWatch]

How to move, lift, and use big water bottles saving your back.

[📹 Aleksandar Dejanovic / dr__fitbacks]

According to an index developed in 2015, Earth is not the most habitable planet found yet.

Kepler-442b, a rocky near-Earth-sized exoplanet that is 1206 light-years away from Earth, has a rating of 0.836. On the other hand, Earth has a rating of 0.829.

The paper introducing the…

The importance of punctuation
(Commas save lives)

The rule of thumb.

A quick guide to approximate measurements using your hand.

Mammatus clouds are cellular patterns of pouches hanging underneath the base of a cloud, typically a cumulonimbus raincloud. The name derives from the Latin mamma (meaning 'udder' or 'breast').

These filmed over the Chinese province of Hubei.

An Archimedes' screw is a machine used for transferring water from a low-lying body of water into irrigation ditches.

Greek philosopher Archimedes first described it around 234 BCE.

What number do you see?

The Khoekhoegowab language, also known as Nama/Damara, part of the Khoisan languages of Southern Africa, that use click consonants as phonemes

The platypus is so weird that the scientists who first discovered it thought it was fake.

The European explorers assumed an egg-laying, duck-billed, beaver-tailed, otter-footed, venomous mammal had to be an elaborate hoax.

[📹 PBS | Nature]

The stunning dynamics of a BMX trick performance at the Nitro World Games

[📹 Ryan Williams]

Just 18 months ago, rescued tiger Maruay only knew a concrete floor and a small cage.

This is an uninterrupted minute of Maruay with his beloved ball.

[📹 wildlife_friends_foundation]

Now you know why

Mount Merapi, the most active volcano in Indonesia, with a meteor's streak, prospectively falling in its crater

[📸 Gunarto Song]