A FEW years ago there appeared to be two; and only two, X-ray phenomena-scattering and fluorescence. One was due to the tremor, the forced vibration, set up in electrons when matter was traversed ...

Drone footage from a 2019 research survey shows a young male orca known as A99 “Alder" with a dead salmon on his head. A recent sighting of another salmon-wearing orca also sparked excitement.