Stories by perihelions

John Baez' Applied Category Theory Lectures

Saltwater is pushing its way up the Mississippi River

A saltwater wedge is moving up the drought-drained Mississippi River

Caledonian Forest

SpaceX wins first Pentagon contract for Starshield

What is Amazon’s [redacted] ‘Project Nessie’ algorithm?

Matteo Messina Denaro, Long-Sought Italian Mafia Boss, Dies at 61

Kaufman Electrification Act of 1923

Denver Zephyr

Not Paying Attention in Class? China’s “Smart Eye” Will Snitch on You (2018)

1987 Nuclear Mars Mission

Ex-congressman convicted of insider trading before T-Mobile merger with Sprint

Private AI summit with senators, titans of tech garners controversy

Luneburg lens radar reflectors make stealth aircraft visible on radar screens

Which of the World’s Hundreds of Thousands of Aging Dams Will Be Next to Burst?

Friday Facts #375 – Quality

Project: ICE cube thruster

Illegal Mopeds and Fake Names: Migrants Scrape by in Underground Economy

‘Sea is constantly dumping bodies’: fears Libya flood death toll may hit 20k

Mapping Where Floods Have Devastated a Libyan Port City

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