This is the last full batch of photos I have save a few singletons and doubletons. But I ain’t too proud to beg. . .
Today we have some lovely photos by Ephraim Heller on, of all things, herring. Ephraim’s captions and IDs are indented, and you can enlarge the photos by clicking on them.
Pacific herring (Clupea pallasii) spend most of the year dispersed across the open North Pacific, but each spring they converge on Sitka Sound to spawn. The 2026 spawning biomass was estimated at roughly 233,000 tons of mature herring. This attracts commercial fishermen, fishing birds, Steller sea lions, gray whales, humpback whales, and. . . me. My last post featured humpback whales.
Today’s post features the mayhem taking place off the coast of Sitka on the opening day of commercial herring season. The fishing boats employ purse netting, a form of seine netting, in which a school of fish are surrounded by a net which is pulled tight around them. As the net closes and the herring are forced to the surface, a buffet is created for glaucous-winged gulls (Larus glaucescens) and bald eagles (Haliaeetus leucocephalus).
A commercial fishing boat hauling in a seine net filled with Pacific herring:
The herring are forced to the surface by the seine:
Glaucous-winged gulls at the buffet:
It was impressive to watch the gulls catch a herring, quickly reposition the squirming fish in their bills, and swallow them in flight in a matter of seconds:
Such speed seems necessary because kleptoparasites abound:
Now for the bald eagles:
Air traffic control is kept busy:
Another attempt to demonstrate that the fiction of acupuncture is based in reality. This time it is the interstitium. Nope.
The post Lipstick on Fengxi first appeared on Science-Based Medicine.A round-up of plausible-sounding myths about the Moon, most of which you've probably heard, and some of which you might believe.
Learn about your ad choices: dovetail.prx.org/ad-choicesYou’re doing some late afternoon work on the habitat as part of humanity’s first exoplanet settlement, but the sun is going down so you’re trying to speed things up. Just as the light dims, everything suddenly starts getting brighter. You look up and see the sun starting to rise again, except it’s your second sun. You kick yourself for not checking the daily sunrise and sunset logs, but you’re happy you get to put in a bit more work before you eat dinner.
There's a distinct category of exoworlds out there that orbit two stars. They're called "circumbinary" planets and up until recently, astronomers had only found about 18 of them among the 6000+ other known exoplanets and candidates. Now, a team at the University of New South Wales (UNSW) in Sydney, Australia, have found 27 more potential circumbinary worlds. They credit a new method, called apsidal precession, for their finding.
During the 1970s, the first interstellar probes were launched, carrying messages specifically designed to be intelligible to extraterrestrial species. The messages were essentially a "message in a bottle" intended for an advanced civilization, should they find the probes someday.
Our Solar System is currently passing through the Local Interstellar Cloud, a region of highly diluted gas and dust between the stars. On its path, Earth continuously accumulates iron-60, a rare radioactive isotope of iron produced in stellar explosions. This has now been confirmed by an international research team led by the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) through the analysis of Antarctic ice tens of thousands of years old. From the steady but time-varying influx, the researchers conclude that the radioactive isotope has been stored within the cloud since a long-past stellar explosion.
Asteroid mining seems simple in theory. A spacecraft flies up to a giant rock in space, scoops out some material, and either processes it on site or returns it back to a huge central processing facility. But in practice, it is certainly not that simple, and a new paper from some Spanish researchers, available in pre-print form on arXiv, showcases one of the reasons why - many small asteroids are spinning ridiculously fast.