The week of February 18–24 saw historic moments in space science, plus hope for endangered species and the climate here on Earth.
Coronavirus vaccinations began in the Gaza Strip after a rival of Palestine's president organized delivery of the Russian vaccine.
Astronomers published a map of 25,000 supermassive black holes, covering 4 percent of the northern sky.
Researchers using a Cherenkov radiation detector in Siberia determined that nearly all high-energy neutrinos are produced in quasars, contrary to previous research.
A 10,150-year-old dog bone fragment was discovered in Alaska, supporting claims that dogs migrated with the first humans to the Americas.
Scientists proposed the existence of a particle heavier than the Higgs boson, which could reveal the origin of dark matter.
The U.S. finished the 30-day process to re-enter the Paris Agreement and committed to taking action against climate change.
Scientists revealed the black-footed ferret Elizabeth Ann, the first successful clone of a native endangered species in the U.S.
NASA's Perseverance rover touched down in the Jezero Crater on Mars, beginning its mission to find signs of ancient life on the planet.
NASA/JPL-Caltech
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