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This fascinating map is made by Alasdair Rae of Sheffield, England, a former professor of urban studies who is the founder of Automatic Knowledge. It shows world population density in 3D.

Details: "No land is shown on the map, only the locations where people actually live. ... The higher the spike, the more people live in an area. Where there are no spikes, there are no people (e.g. you can clearly identify ... the Sahara Desert)."

  • The major world population concentrations are immediately obvious — particularly China, India and Indonesia.
  • "Yet it is often also possible to pick out even quite small towns and cities, such as those in the south of New Zealand, or northern Russia."

How it works: Rae says that he uses "data from the EU's GHSL dataset, software is Aerialod by @ephtracy and render time for the big image was about 6 hours."

  • Rae explains that the light-and-shadow effect lets you identify some isolated population centers, including ones in Hawaii and central Australia.
  • And he reminds us of the old saying: "Where there is water, there is life."

Go deeper: "How to make a 3D population density render for any country in the world." ... More maps.

Go deeper

2 hours ago - Health

Axios AM Deep Dive: Covid forever

Illustration: Aïda Amer/Axios

It was 563 days ago that the WHO declared Covid-19 a pandemic. This Axios AM Deep Dive, led by healthcare reporter Caitlin Owens, looks at our Covid future.

Federal judge blocks vaccine mandate for NYC teachers

Students are dismissed from the first day of school at PS 133 in Brooklyn on Sept. 13. Photo: Michael Nagle/Xinhua via Getty Images

A federal appeals court judge on Friday temporarily blocked New York City schools from enforcing a vaccine mandate for school employees, days before it was set to take effect, AP reports.

Driving the news: The vaccine mandate was set to begin on Monday, prompting concerns over staffing shortages in schools across the nation's largest school system.

CCP releases two jailed Canadians after Huawei CFO deal with DOJ

Photo: Sheldon Cooper/SOPA Images/LightRocket via Getty Images

Two Canadians imprisoned by the Chinese government for over 1,000 days have been released and are expected to arrive in Canada on Saturday, Prime Minister Justin Trudeau said Friday.

Why it matters: Their release comes hours after Huawei Technologies CFO Meng Wanzhou reached a deal with the U.S. Department of Justice that resolves the criminal charges against her and could pave the way for her to return to China.