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A medium ground finch, one of the two Galapagos finches that led to the new lineage.

Scientists have directly documented a new species evolving in the wild for the first time, according to the BBC. Fittingly, the event was seen in Galapagos Island finches, the same group of birds that helped Darwin solidify his theory of evolution. The research, published Thursday in the journal Science, started in 1981, when a single male from a different finch species came to the tiny island of Daphne Major.

Why it matters: This is the first time the formation of a new species has been observed in real-time in the wild. More than that, it shows how just a single individual can breed with one from another species, leading to the creation of a new species.

For several decades, scientists have been meticulously documenting minute changes in different finch species on the Galapagos Islands, an archipelago that's been referred to as a "natural laboratory for evolution."

How it started: The initial hybridization event happened in 1981 on the Galapagos island of Daphne Major, where evolutionary biologists Peter and Rosemary Grant conducted most of their research. They studied the group so closely that they noticed when a male large cactus finch, native to a different island 65 miles away, arrived on the island and began breeding with a local population.

What happened: Native females didn't recognize the songs of the new hybrid males, so instead of breeding with the local population as expected, the hybrids bred within their population. This paper shows that after just two generations, they stopped breeding with other populations and have remained reproductively isolated ever since.

Taking off: "In most cases, the offspring of cross-species matings are poorly adapted to their environment," writes Rory Galloway for the BBC. But the large size of these hybrids has allowed them to exploit resources the native birds weren't using, so the birds have flourished.

Go deeper: It just so happens that Darwin's personally annotated copy of The Origin of Species is up for auction. The Guardian has the story.

Go deeper

Updated 2 mins ago - Politics & Policy

Trump received COVID vaccine at White House in January

Photo: Noam Galai/Getty Images

Former President Trump and former first lady Melania Trump were both vaccinated at the White House in January, a Trump adviser tells Axios.

Why it matters: Trump declared at CPAC on Sunday that "everybody" should get the coronavirus vaccine — the first time he's encouraged his supporters, who have been more skeptical of getting vaccinated, to do so.

Biden administration seeks to allow separated migrant families to reunite in U.S.

Secretary of the Department of Homeland Security Alejandro Mayorkas announced Monday that the Biden administration will explore "lawful pathways" to allow migrant families separated under the Trump administration to reunite in the U.S.

Why it matters: Biden has pledged to reunite the hundreds of families still separated as a result of the Trump administration's "zero tolerance" policy, and signed an executive order last month creating a family separation task force chaired by Mayorkas.

CDC director warns "now is not the time" to lift COVID restrictions

CDC director Rochelle Walensky warned states on Monday that "now is not the time" to lift public health restrictions, as the recent dramatic declines in coronavirus cases and deaths "appear to be stalling."

Why it matters: While the average of 70,000 new infections and 2,000 daily deaths is nowhere near the extremely high levels recorded at the start of 2021, the figures are still a poor baseline to "stop a potential fourth surge" — especially with the threat posed by more contagious new variants, Walensky warned.