Scientists study how the brain of a fish filters out signals - NPR

A new method for identifying magnetic activity on the far side of the Sun rejects about 90% of false helioseismic detections before they enter solar magnetic-field simulations. Tests found that conventional near-side-driven simulations underestimated the Sun’s total unsigned magnetic flux by roughly 10–20%, showing how much magnetic activity can be missing while active regions develop beyond direct Earth view. Scientists have long been able to reconstruct magnetic maps of the full Sun, but the hidden hemisphere remains a fundamental weakness. Surface flux transport models evolve magnetic fields measured on the Earth-facing side as the Sun rotates, yet they cannot directly capture an active region that emerges or continues growing out of view. The resulting maps provide boundary conditions for models of the corona and heliosphere, so missing far-side magnetic flux can propagate into calculations of the solar environment. Bibhuti Kumar Jha and colleagues developed a probabilistic system for deciding which far-side helioseismic detections are credible enough to add to an Advective Flux Transport (AFT) simulation. Helioseismology does not photograph the magnetic field itself.

Lawrence Livermore National Laboratory researcher Isaiah Santistevan led the development of three-dimensional simulations exploring how a nuclear device could deflect or disrupt an asteroid threatening Earth. Credit: Blaise Douros/LLNL Lawrence Livermore National Laboratory (LLNL) researchers are developing three-dimensional simulations to examine how a nuclear device could be used to deflect or potentially disrupt an asteroid threatening Earth.

Orcas are hunting great White Sharks around the world, scientists confirmThe killing of great whites by orcas has been reported in the waters of South Africa, California, and Australia, and the implications that the hunting behaviour would have on the marine ecosystem have been considered. In fact, it all started back on May 3, 2017, when the body of a female great white, weighing 1,100 kilograms, washed ashore in Gansbaai, close to Cape Town, with a deep gash through which its 90-kilogram liver had been extracted. Five more corpses of great whites appeared with similar wounds in the coming months, as claimed by shark biologist Alison Towner of Rhodes University. Two adult males, called Port and Starboard, who are supposed to be brothers judging by their dorsal fins that fold differently, were identified as the most probable perpetrators. The connection was officially established in 2022 based on video footage of a drone that caught three orcas chasing and biting a 3-meter great white off Mossel Bay. The sharks quickly disappeared from Dyer Island, one of the best places in the world to witness a great white.