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Data: Macrotrends; Map: Andrew Witherspoon/Axios

Places with more than 10 million residents — known as megacities — are becoming more common as people from rural areas migrate to urban ones.

Why it matters: The benefits of megacities — which include opportunities for upward mobility and higher wages — can be offset by their negatives, like the fact that they're breeding grounds for COVID-19.

What's happening: Urbanization is proceeding rapidly, with more than half of the world's population now living in cities, according to Visual Capitalist, an online publisher aimed at investors.

  • Cities like Delhi and Shanghai are growing particularly fast.
  • Tokyo — population 37 million — has the most people, but declining birth rates and an aging population could mean that Delhi surpasses it by 2028.
  • By 2035, Bangalore (India) and Lahore (Pakistan) are expected to replace Tianjin (China) and Buenos Aires (Argentina) in the top 20 list, Visual Capitalist said.

Where it stands: The U.S. has two megacities — New York and Los Angeles — but only New York cracked the global top 20, according to Macrotrends, a research platform for investors that published side-by-side rankings of the most populous cities in the U.S. and the world.

  • Rounding out the top 10 in the U.S.: Chicago, Houston, Dallas-Fort Worth, Miami, Atlanta, Philadelphia, Washington, D.C., and Phoenix.

The bottom line: "The world is a crowded place, with human population expected to reach 9 billion by mid-century," says National Geographic, which published this fun interactive of major megacities.

Go deeper

Republican Sen. Sasse slams Nebraska GOP for "weird worship" of Trump after state party rebuke

Sen. Ben Sasse, (R-Neb.) Photo: Andrew Harnik - Pool/Getty Images

The Nebraska Republican Party on Saturday formally "rebuked" Sen. Ben Sasse (R-Neb.) for his vote to impeach former President Trump earlier this year, though it stopped short of a formal censure, CNN reports.

Why it matters: Sasse is the latest among a slate of Republicans who have faced some sort of punishment from their state party apparatus after voting to impeach the former president. The senator responded statement Saturday, per the Omaha World-Herald, saying "most Nebraskans don't think politics should be about the weird worship of one dude."

Cuomo barraged by fellow Dems after second harassment accusation

New York Gov. Andrew Cuomo faced a barrage of criticism from fellow Democrats after The New York Times reported that the second former aide in four days had accused him of sexual harassment.

Why it matters: Cuomo had faced a revolt from legislators for his handling of nursing-home deaths from COVID. Now, the scandal is acutely personal, with obviously grave political risk.

3 hours ago - Health

Fauci: Children "very likely" to get COVID vaccine at start of 2022

NIAID Director Anthony Fauci. Photo: Win McNamee/Getty Images)

Children under age 12 will "very likely" be able to get vaccinated for coronavirus at the "earliest the end of the year, and very likely the first quarter of 2022," NIAID Director Anthony Fauci told "Meet the Press" Sunday.

Why it matters: Children generally aren't at risk of serious coronavirus infections, but vaccinating them will be key to protecting the adults around them and, eventually, reaching herd immunity, writes Axios' Caitlin Owens.