Even stupendous black holes can’t explain dark matter
The theoretical objects would have left a larger imprint on cosmic radiation if they were a source of the invisible force pulling together the galaxies.
Barn owls’ ancestors made a transatlantic flight
Genomic analysis shows that the owls spread from Eurasia to the Caribbean, then colonized the rest of the Western Hemisphere.
Measles made a stealthy return as another virus took the spotlight
Vaccination rates dropped after the COVID-19 pandemic disrupted public-health programmes and their funding.
Methane emissions remain flat even as biggest US oil region opens the tap
Output of the greenhouse gas from the Permian Basin has remained near constant over a period during which oil and gas production tripled.
