TARTIFLET

TARTIFLET

[𝕐o̴g̴ @Yoda4ever]

He was filming resting sharks, and then this happened..🦈😅

[Mario Nawfal @MarioNawfal]

Wild footage from an active volcano showing fresh magma punching through a cooled lava crust

Earth really does not believe in bottling things up.

[Wonder of Science @wonderofscience]

Visualizing magnetic fields.

📽: Magnetic Games

[Aakash Gupta @aakashgupta]

That water clarity is an engineering decision, and the math behind it is wilder than the video.

Roman aqueducts ran on gravity alone. No pumps, no pressure systems. Engineers carved channels with a gradient so shallow it borders on absurd. The Pont du Gard in southern France drops 2.5 centimeters over 275 meters. That's roughly the thickness of a coin over the length of three football fields. They surveyed that accuracy with plumb lines and wooden leveling instruments.

The clarity you're seeing is a direct product of flow velocity. Too steep and the water erodes the channel walls, picks up sediment, turns brown. Too flat and it stagnates. Roman engineers targeted a slope of about 20 centimeters per kilometer, which kept the water moving fast enough to stay fresh but slow enough to stay clear. Before the water reached the city, it passed through multi-chamber settling tanks where velocity dropped near zero. Suspended particles sank. Clean water flowed out the top into the next chamber. Repeat three or four times.

Pliny specified the minimum slope in writing. Vitruvius published the exact mortar ratio for hydraulic cement: one part lime to two parts volcanic ash for underwater work. The pozzolana from Pozzuoli reacted with water to form a calcium-aluminum-silicate compound that actually gets stronger the longer it sits submerged. Modern concrete degrades in water. Roman concrete bonds with it.

Scale the whole system and it gets harder to process. Eleven aqueducts fed Rome at its peak. Combined output: roughly 1 million cubic meters of water per day. That works out to about 250 gallons per person for a city of one million. Modern New York delivers about 125 gallons per person per day. Ancient Rome had access to double the per capita water supply of the largest city in the United States, running entirely on slope and stone.

The Trevi Fountain in Rome is still fed by one of them. Two thousand years, same source, same gravity, same water.

[𝐒𝐚𝐫𝐚𝐡 @iish206]

@madaomoshiroi

[まだ面白い @madaomoshiroi]

クチバシが挟まって身動きの取れないカワセミを解放してあげると…

[Massimo @Rainmaker1973]

A man got off work and discovered that his dog had run the 24 kilometers from his house to his job and was waiting for him on top of his car.

Dogs are the only living creatures in the world that love unconditionally.

[Eliaens @eliaens_shop]

Hate garlic prep mess? This slick tool makes cooking a breeze!😎🧄
Grab yours 👉https://t.co/jXIyHvxvkB

[Oceaiii🐋🐬 @oceaiii]

A nocturnal flamenco under the sea. ✨💃 The stunning Spanish Dancer nudibranch putting on a masterclass in underwater elegance.

[Physics & Astronomy Zone @zone_astronomy]

An interesting watch.

[Curiosity @CuriosityonX]

Detailed view of our Moon

[Ralph the Destroyer! 🧱 @ZerMike]

@MarioNawfal She graduated. 😅😅

[ごだか @G_Godaka]

ミミズになるパズルゲーム
『WOIM』

プレイヤーはミミズ。
長くてくねくねした体を使ってパズルを解き、地下世界を進んでいくゲーム。

グラフィックのかわいらしさに反して扉で胴体を切断したりハサミでちぎったりと、ミミズボディが最大限活かされている期待作。

[Snack Reel @SnackReel]

When flour and Greek yogurt come together magic happens

[Arcfunmi @Arcfunmi]

What it feels like to build on a bamboo-infested land without first getting rid of the bamboo

[Valérie Boyer @valerieboyer13]

L'émotion de la courageuse #MickaëllePaty qui se bat pour le mémoire de son frère me touche comme celle de l'équipe de "l'abandon"... un film essentiel, lucide et terrible à diffuser dans les établissements scolaires

[Physics & Astronomy Zone @zone_astronomy]

A small reminder of how huge Jupiter is.

[kleinita @kleinita_store]

Reasons for homeowners to switch from outdated lights to these nifty motion detectors!
shop now:https://t.co/SdAkZzRzQZ

[Wonder of Science @wonderofscience]

Fifteen uncoupled simple pendulums of monotonically increasing lengths dance together to produce visual traveling waves, standing waves, beating, and seemingly random motion.

📽: Harvard Natural Sciences Lecture Demonstrations

[Massimo @Rainmaker1973]

Grass sledding on the Grassland in Inner Mongolia

ᵇᵃᶜᵏᵍʳᵒᵘⁿᵈ ˢˡᶦᵍʰᵗˡʸ ʳᵉᵗᵒᵘᶜʰᵉᵈ ᵇᵘᵗ ʳᵉᵃˡ ˡᵒᶜᵃᵗᶦᵒⁿ