Science — News from both sides

Interstellar visitor 3I/ATLAS: alien craft or just a weird comet?

When the interstellar object 3I/ATLAS swept through our solar system, Harvard's Avi Loeb flagged 'anomalies' he said could hint at alien technology. Most astronomers said it was simply an unusual comet.

Alien-tech hypothesis Avi Loeb (Medium)

Natural comet (consensus) IFLScience

Science May 31

Dark matter or modified gravity? Cosmology's deepest standoff

Most physicists invoke invisible 'dark matter' to explain how galaxies move; a minority argue our laws of gravity need modifying (MOND) instead. Decades on, neither side has landed a knockout blow.

Dark matter (mainstream) Physics World

Modified gravity (MOND) ScienceDaily

Science May 24

Where did COVID come from? Lab leak vs natural spillover

Years on, the origin of SARS-CoV-2 is still contested: most scientists favour a natural jump from animals at a Wuhan market, while others — and some US agencies — suspect a leak from a Wuhan lab.

Natural spillover (majority) Science (AAAS)

Lab-leak hypothesis France 24