Some Antarctic icebergs linger close to home for decades, running aground near the ice shelves that spawned them or circling partway around the continent on coastal currents. Others, like Iceberg A-81, make a faster exit, heading north out of the Weddell Sea along a route well-traveled by the region’s bergs. Fast is relative, though. After
We would welcome discussion of three broader questions: What expectations should govern early access to AI-generated results, disclosure of conflicts of interest, and the use of unpublished material for subsequent research? How should credit recognize both new discoveries and the work of checking, fixing, simplifying, explaining, and extending them? How can we support students and
Explanation: Sometimes it’s night on the ground but day in the air. As the Earth rotates to eclipse the Sun, sunset rises upfrom the ground. Therefore, at sunset on the ground, sunlight still shines on clouds above. Under usual circumstances, a pretty sunset might be visible, but unusual noctilucent clouds float so high up they can be seen well after dark. Normally
The best portable charger is the Anker Prime Power Bank (26K, 300W) ($229.99 at Anker as of October 2026), because it can fast-charge two laptops and a phone at once, gets back to 80 percent in 40 minutes by Anker’s rating, and stays just under the 100Wh airline limit. If you carry an iPhone, the
The large sunshade of NASA’s Near-Earth Object (NEO) Surveyor mission is inspected by a technician at BAE Systems Space & Mission Systems in Boulder, Colorado, in late July. Built by Applied Aerospace in Stockton, California, the sunshade structure was outfitted with its solar cells by SolAero Technologies in Albuquerque, New Mexico, in January. Environmental testing
This 360-degree look at Neretva Vallis within Mars’ Jezero Crater was stitched together using 217 images acquired by the rover’s Mastcam-Z on May 20, 2024, the 1,155th Martian day, or sol, of the mission. While it is a wind-swept dusty vista today, billions of years ago it was home to a river channel that fed fresh water into Jezero