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SpaceX Dragon fires thrusters to boost ISS orbit for the 1st time
NASA's X-59 'quiet' supersonic jet test fires engine for 1st time
Astronomers spot unusually synchronized star formation in ancient galaxy for 1st time
SpaceX's Starlink internet flies on a Boeing 777 jet for the 1st time
'Precipitation, the source of all fresh water, can no longer be relied upon': Global water cycle pushed out of balance 'for 1st time in human history'
Boeing’s Starliner astronauts speak publicly today for 1st time in 2 months: Watch it live
The bubbling surface of a distant star was captured on video for the 1st time ever
Quantum data beamed alongside 'classical data' in the same fiber-optic connection for the 1st time
Scientists collect high-resolution images of the North Star's surface for 1st time
Europe's new Ariane 6 rocket launching for 1st time ever this week
Hubble Telescope maps high-speed 'burps' from nearby feeding supermassive black hole for 1st time
Rare fungal STI spotted in US for the 1st time
Boeing's Starliner launches astronauts for 1st time in historic liftoff (photos, video)
Massive, magnetic stars beyond the Milky Way detected for the 1st time
Solar Orbiter traces solar wind back to its mysterious source for 1st time
Rocket Lab gearing up to refly Electron booster for 1st time
Gravitational waves reveal 1st-of-its-kind merger between neutron star and mystery object
NASA's Parker Solar Probe makes 1st-of-its-kind observation within a coronal mass ejection
Giant 'toe biter' water bugs discovered in Cyprus for the 1st time
Explosive 'devil comet' returns for 1st time in 71 years during April 8 eclipse, NASA says
