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The sun shines over China's Kunlun Station in Antarctica in 2019. Photo: Liu Shiping/Xinhua via Getty Images

Argentina's Esperanza Base on Antarctica's Trinity Peninsula reached 65°F (18.3°C) on Thursday, notching the continent's warmest temperature in recorded history, per the World Meteorological Organization.

Why it matters: Antarctica is one of the globe's fastest-warming regions with temperatures rising 5°F (2.8°C) in the past 50 years, spurring the retreat of 87% of the glaciers along the Antarctic peninsula's west coast, the Washington Post reports.

  • The continent's last record-breaking temperature of 63.5°F (17.5°C) was recorded in the same location — near the peninsula's northernmost tip — on March 24, 2015.

Worth noting: The WMO referred to the temperature reading as "a likely record" as it still has to be officially reviewed and certified.

Go deeper: Climate models suddenly predict much faster warming, stumping scientists

Go deeper

CPAC Republicans choose conservatism over constituents

Rep. Matt Gaetz. Photo: Elijah Nouvelage/Bloomberg via Getty Images

CPAC proved such a draw, conservative Republicans chose the conference over their constituents.

Why it matters: More than a dozen House Republicans voted by proxy on the $1.9 trillion COVID-19 relief bill in Washington so they could speak at the Conservative Political Action Conference, known as CPAC. And Sen. Ted Cruz skipped an Air Force One flight as President Biden flew to Cruz's hometown of Houston to survey storm damage.

Border Democrat warns Biden about immigrant fallout

Henry Cuellar (right). Photo: Tom Williams/CQ-Roll Call Inc. via Getty Images

A Democratic lawmaker representing a border district warned the Biden administration against easing up too much on unauthorized immigrants, citing their impact on his constituents, local hospitals and their potential to spread the coronavirus.

Why it matters: Rep. Henry Cuellar (D-Texas) told Axios he supports President Biden. But the moderate said he sees the downsides of efforts to placate pro-immigrant groups, an effort that threatens to blow up on the administration.

3 hours ago - World

Iran rejects nuclear talks with U.S., for now

Iranian Foreign Minister Javad Zarif at Iran/EU talks in 2015. Photo: Carlos Barria/POOL/AFP via Getty

A spokesman for Iran’s Foreign Ministry said on Sunday that conditions are not ripe for informal nuclear talks between Iran, the U.S. and other world powers.

Why it matters: The Biden administration had proposed the talks as part of its efforts to negotiate a path back to the 2015 nuclear deal. The White House expressed disappointment with Iran's response, but said it remained willing to engage with Tehran.