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Plastic bags wrap around trees along the Sindh River in India. Photo: Idrees Abbas/SOPA Images/LightRocket via Getty Images

For the first time in history, human-made materials now likely outweigh all life on Earth.

Why it matters: If true, it would mean the world had reached a crossover point where humankind's total footprint is heavier than the combined mass of natural life — and there's little indication that trend will change anytime soon.

Driving the news: In a paper published on Wednesday in Nature, researchers calculated the weight of roads, buildings and just about everything else humans manufacture currently to be about 1.1 trillion tons.

  • Living biomass like plants and animals comes in at approximately 1 trillion tons.
  • And while the weight of human-made materials is doubling every 20 years, the weight of living biomass has halved since the dawn of the agricultural revolution 10,000 years ago.
  • The researchers calculated human-made materials were just 3% of the weight of living biomass at the start of the 20th century.

What they're saying: "Some people think that humanity is just one species out of many, and that we’re tiny and the world is huge," Ron Milo, a researcher at the Weizmann Institute of Science and a lead author on the paper, told TIME.

  • "But our impact is not tiny."

Be smart: The paper's results provide one more piece of evidence that the planet has entered what scientists call the Anthropocene.

  • That means human beings, more than any other species or natural process, are by far the dominant power on the planet.

The bottom line: As Spiderman's Uncle Ben could tell you, with great power comes great responsibility. It's up to humanity to use that power more wisely than we have in the past — if we want a future at all.

Go deeper

Miriam Kramer, author of Space
Jul 7, 2020 - Science

The race to find Planet X heats up

Illustration: Eniola Odetunde/Axios

Teams of scientists are vying to be the first to spot a large, hypothetical planet that might be lurking in the outer reaches of our solar system.

Why it matters: Astronomers have found thousands of planets orbiting other stars, but the hunt for this possible planet orbiting our own Sun — called Planet X or Planet 9 by some — is showing just how little we know about our solar system.

Most teachers are white. Most students aren't.

Expand chart
Data: U.S. Department of Education, National Center for Education Statistics; Chart: Baidi Wang/Axios

The nation's 6.6 million teacher workforce has grown more racially and ethnically diverse over the past three decades — but not nearly fast enough to keep pace with a student population that's nearing majority-minority in public schools, two new reports show.

Why it matters: The disparities are especially acute between Hispanic students and teachers, and in schools with 90% or higher non-white student populations.

Updated 12 hours ago - World

UK government: Kremlin has plan "to install pro-Russian leadership" in Ukraine

British Foreign Secretary Elizabeth Truss. Photo: Gints Ivuskans / AFP via Getty Images

The United Kingdom's Foreign Secretary on Saturday night said the government has "information that indicates the Russian Government is looking to install a pro-Russian leader in Kyiv as it considers whether to invade and occupy Ukraine."

Driving the news: U.S. National Security Council spokeswoman Emily Horne called the intelligence "deeply concerning" in a statement to Axios. The Biden administration has said Russia is actively manufacturing a pretext for invasion and warned that Putin could use joint military exercises in Belarus as cover to invade from the north.