A study posted on arXiv suggests that about 300 years ago, a compact swarm of massive stars may have carved a nearly round hole in the glowing gas near the Milky Way’s central black hole. The target is the mini-cavity, a low-density pocket inside the ionized gas known as the mini-spiral around Sagittarius A*. The…
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A study in Nature has reported observational evidence of a hidden gravitational-wave component in GW250114, the loudest binary black hole merger detected so far. By pulling out this faint signal from the merger’s aftermath, researchers have found a new way to probe the region just outside a newly formed black hole’s event horizon. The work…
A study in Communications Earth & Environment has found that water scarcity could limit the United States’ effort to expand domestic lithium mining by mid-century. The research examined whether the nation’s sole operating lithium mine and 22 proposed mines likely to be active in 2050 would have enough water under future climate and development scenarios.…
A study in The Seismic Record has revealed a striking underground feature in south-central Alaska. Researchers led by Meghan Miller of the Australian National University used machine learning to identify thousands of tiny earthquakes, including about 1,750 that trace a nearly straight 250-kilometer line beneath the Alaska Range. That line appears to mark the sharp…
