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Dogs may have split from wolves in a single domestication event 40,000 years ago, per a new study in Nature Communications. The research challenges an earlier study claiming dogs were domesticated twice — in Asia and Europe.

What they found: Researchers analyzed genomes from dog fossils — including a 7,000-year-old skull found in Germany and a 5,000-year-old specimen from Ireland — and compared them to DNA from modern dogs and wolves. The rates of mutation in the genomes suggest dogs split from wolves about 40,000 years ago and then again into European and Asian breeds about 20,000 years ago, the study says. Domestication happened sometime in between.

  • Not so fast: This study follows a 2016 paper suggesting there were two domestication events: one in Europe and one in Asia. The striking genetic differences between European and Asian dogs supports this hypothesis, Gregor Larson, an author of the 2016 paper, told the Washington Post. He added that scientists have not found ancient dog bones in the middle of the Eurasian continent, suggesting there was no split, but in fact two cases of domestication.
  • A trend: New technology is allowing scientists to analyze ancient DNA samples with more scrutiny and, as a result, piece together timelines of animal domestication that, in turn, can tell us more about the ancient humans they lived beside.

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Updated 22 mins ago - Politics & Policy

Coronavirus dashboard

Illustration: Sarah Grillo/Axios

  1. Global: Total confirmed cases as of 4 p.m. ET: 31,175,205 — Total deaths: 962,076— Total recoveries: 21,294,229Map.
  2. U.S.: Total confirmed cases as of 4 p.m. ET: 6,829,956 — Total deaths: 199,690 — Total recoveries: 2,590,695 — Total tests: 95,121,596Map.
  3. Health: CDC says it mistakenly published guidance about COVID-19 spreading through air.
  4. Media: Conservative blogger who spread COVID-19 misinformation worked for Fauci's agency.
  5. Politics: House Democrats file legislation to fund government through Dec. 11.
  6. World: "The Wake-Up Call" warns the West about the consequences of mishandling a pandemic.

McConnell: Senate has "more than sufficient time" to process Supreme Court nomination

Senate Majority Leader Mitch McConnell (R-Ky.) said in a floor speech Monday that the chamber has "more than sufficient time" to confirm a replacement for Supreme Court Justice Ruth Bader Ginsburg before the election, and accused Democrats of preparing "an even more appalling sequel" to the fight over Brett Kavanaugh's confirmation.

Why it matters: Senate Minority Leader Chuck Schumer (D-N.Y.) has said "nothing is off the table next year" if Republicans push ahead with the confirmation vote before November, vowing alongside Rep. Alexandria Ocasio-Cortez (D-N.Y.) to use "every procedural tool available to us to ensure that we buy ourselves the time necessary."

House Democrats file legislation to fund government through Dec. 11

House Speaker Nancy Pelosi (D-Calif.). Photo: Chip Somodevilla/Getty Images

House Democrats on Monday released their proposal for short-term legislation to fund the government through December 11.

Why it matters: This is Congress' chief legislative focus before the election. They must pass a continuing resolution (CR) before midnight on Oct. 1 to avoid a government shutdown — something both Hill leaders and the White House have claimed is off the table.