7+ hour, 41+ min ago  (632+ words) Today, we take ice for granted. But having ice produced in your home is a relatively modern luxury. As early as 1750 BC, ancient people would find ice on mountains or in cold areas and would harvest it. They'd store it,…...

3+ week, 6+ day ago  (633+ words) VLEO satellites hold considerable promise, but successfully operating in this unique environment requires certain design considerations. The result are vehicles that look less like the flying refrigerators we're used to, with a hybrid design that features the sort of aerodynamic…...

2+ mon, 1+ week ago  (346+ words) https://www.nasa.gov/image-feature/japans-northernmost-main-island-of-hokkaido " data-image-caption="Japan's northermost island of Hokkaido, with the glow from Earth's atmosphere visible. (Source: NASA, Aki Hoshide) " data-medium-file="https://hackaday.com/wp-content/uploads/2021/07/japan_northernmost_island_hokkaido_from_ISS.jpg?w=400" data-large-file="https://hackaday.com/wp-content/uploads/2021/07/japan_northernmost_island_hokkaido_from_ISS.jpg?w=800" />Recently the MagQuest competition on improving the measuring of the Earth's magnetic field announced that the contestants in…...

2+ mon, 2+ week ago  (405+ words) The past few months, we've been giving you a quick rundown of the various ways ores form underground; now the time has come to bring that surface-level understanding to surface-level processes. Strictly speaking, we've already seen one: sulfide melt deposits…...

2+ mon, 3+ week ago  (450+ words) [A circular metal vessel is shown, with a symmetrical rotor of four vanes standing inside. At the bottom of the vessel are four loudspeakers.]A Crookes radiometer, despite what many explanations claim, does not work because of radiation pressure. When…...

5+ mon, 2+ week ago  (1295+ words) Human existence boils down to one brutal fact: however much food you have, it's enough to last for the rest of your life. Finding your next meal has always been "read more Human existence boils down to one brutal fact:…...

5+ mon, 2+ week ago  (240+ words) Launched in 2004, the Neil Gehrels Swift Observatory " formerly the Swift Gamma-Ray Burst Explorer " has been dutifully studying gamma-ray bursts (GRBs) during its two-year mission, before moving on "read more Launched in 2004, the Neil Gehrels Swift Observatory " formerly the Swift Gamma-Ray…...

6+ mon, 5+ day ago  (658+ words) So, there are two things needed for a rock to be an ore: an element must be concentrated to a high enough level, and it be in a form that we can extract it economically. No wonder, then, that almost…...

6+ mon, 3+ week ago  (174+ words) Earth science 1 Articles Hackaday Links: July 27, 2025 July 27, 2025 by Dan Maloney 9 Comments ... Here we go again. It looks like hams have another spectrum grab on their hands, but this time it's the popular 70-cm band that's in the crosshairs. Starlink wannabe…...

7+ mon, 3+ week ago  (342+ words) In an Earth-sized take on the age-old "correlation or causality" question, researchers have come across a fascinating match between Earth"s magnetic field and its oxygen levels since the Cambrian explosion, "read more " data-image-caption="Time series of O2 (blue) and VGADM…...