U.S. Army Corps of Engineers Bay Model

The U.S. Army Corps of Engineers Bay Model is a working hydraulic scale model of the San Francisco Bay and Sacramento-San Joaquin River Delta System.

235 points on HN · https://news.ycombinator.com/item?id=48373642

Richat Structure

The Richat Structure, or Guelb er Richât, often called the Eye of Africa is a prominent circular geological feature at the northwestern edge of the Taoudeni Basin, on the Adrar Plateau of the Sahara.

https://news.ycombinator.com/item?id=49667272

Kuleshov effect

The Kuleshov effect is a film editing (montage) effect demonstrated by Russian filmmaker Lev Kuleshov in the 1910s and 1920s.

151 points on HN · https://news.ycombinator.com/item?id=18803695

Room 641A

Room 641A is a telecommunication interception facility operated by AT&T for the U.S. National Security Agency, as part of an American mass surveillance program.

https://news.ycombinator.com/item?id=49662367

Neijuan

Neijuan, sometimes known by the English term involution, is a Chinese term that describes a condition in which a system, institution, or competitive process continues to intensify in effort, complexity, or participation without a…

https://news.ycombinator.com/item?id=49655176

Larger Pacific striped octopus

The larger Pacific striped octopus (LPSO), or Harlequin octopus, is a species of octopus known for its intelligence and gregarious nature.

https://news.ycombinator.com/item?id=49621018

ILoo

The iLoo was a cancelled Microsoft project to develop a Wi-Fi Internet-enabled portable toilet.

354 points on HN · https://news.ycombinator.com/item?id=9933435

Nördlinger Ries

The Nördlinger Ries is an impact crater and large circular depression in western Bavaria and eastern Baden-Württemberg. It is located north of the Danube in the district of Donau-Ries.

https://news.ycombinator.com/item?id=49599767

M-DISC

M-DISC is a write-once optical disc technology introduced in 2009 by Millenniata, Inc. and available as DVD and Blu-ray discs.

https://news.ycombinator.com/item?id=49531619

Hayes AT command set

The Hayes command set is a specific command language originally developed by Dale Heatherington and Dennis Hayes for the Hayes Smartmodem in 1981.

https://news.ycombinator.com/item?id=49567961

Parque Arqueológico do Solstício

The Parque Arqueológico do Solstício, referred to in academic sources as AP-CA-18, is an archaeological park located in Amapá state, Brazil, near the city of Calçoene.

https://news.ycombinator.com/item?id=49505306

Holden's Lightning flight

On 22 July 1966, Walter "Taffy" Holden, a 39-year-old engineer in command of No.

https://news.ycombinator.com/item?id=49508405

Magic eye tube

A magic eye tube or tuning indicator, in technical literature called an electron-ray indicator tube, is a vacuum tube which gives a visual indication of the amplitude of an electronic signal, such as an audio output, radio-frequency…

https://news.ycombinator.com/item?id=49490498

Lion-man

The Löwenmensch figurine, also called the Lion-man of Hohlenstein-Stadel, is a prehistoric sculpture discovered in Hohlenstein-Stadel, a German cave, part of the Caves and Ice Age Art in the Swabian Jura UNESCO World Heritage Site, in 1939.

https://news.ycombinator.com/item?id=49494181