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Astronomers using the James Webb Space Telescope have identified a class of objects called little red dots that shine as brightly as entire galaxies despite being tiny. Two recent studies propose these are not standard black holes but black hole stars, massive lumps of hydrogen enveloping a central singularity. These sources appear so exotic that researchers claim no similar object has been detected by ground-based telescopes.

The existence of these objects remains unconfirmed, with a subset of astrophysicists arguing the data fits standard active galactic nuclei instead. If they are real, they rewrite the timeline of early universe structure, but the field is currently divided on interpretation.

more: https://www.quantamagazine.org/black-holes-or-black-hole-stars-astronomers-spar-over-webb-telescopes-little-red-dots-20260914/

Researchers analyzed 422 bird species across 1,410 sites in seven Indonesian islands and found that high species richness does not guarantee ecological health. They measured phylogenetic diversity to assess how distantly related the coexisting birds are, revealing that forest condition depends on these evolutionary distances rather than simple headcounts.

This suggests conservation targets must account for unique lineages that may be highly vulnerable despite a seemingly lush habitat. The study covers specific Indonesian islands, so broader global applicability remains unproven, and the data relies on a specific 2010-2022 timeframe for forest cover changes.

more: https://theconversation.com/hutan-yang-ramai-kicau-burung-belum-tentu-sehat-riset-membuktikannya-lewat-pohon-evolusi-290821