Is Cloud Seeding Worth the Bet?

Posted on Categories Discover Magazine

Pilots from Weather Modification, Inc., prepare the cloud seeding aircraft with seeding flares. (Credit: Derek Blestrud, Idaho Power Company) “Make mud, not war.” That was the slogan of the American 54th Weather Reconnaissance Squad, the first military force to engage in weather warfare. Throughout the Vietnam War, they flew 2,602 missions, releasing silver iodide, a compound that seeded clouds and exacerbated monsoons—or so the thinking went. Dubbed “Operation Popeye&r ...read more

Whip Spiders Use Their Feet to Smell Their Way Home

Posted on Categories Discover Magazine

After a late dinner, a jungle-dwelling whip spider can’t rely on an Uber driver to get her home. She has to find the way herself, in the pitch-black, picking her way over thick undergrowth to reach the tree she lives on. It’s a trick she can even manage when plucked from her home tree and tossed into the forest at random, up to 10 meters away. Now scientists think whip spiders don’t use her eyes for this homing feat—they use their feet. Whip spiders hunt b ...read more

Fallout from an Ancient Asteroid Collision Still Rains on Earth

Posted on Categories Discover Magazine

(Credit: NASA/JPL/Caltech) Extraterrestrial objects are constantly bombarding Earth; thankfully the vast majority are microscopic. Thanks to the planet’s atmosphere, we live largely unaware of this celestial fusillade, which averages about 100 tons a day and mostly burns up long before hitting the ground. From the few that do make impact, researchers can gather clues about the composition of our solar system, with the goal of understanding how planets and other b ...read more

The Arctic in the Age of Trump

Posted on Categories Discover Magazine

“I am fearful this will affect the Arctic in ways that we have not seen yet” — Margot Wallström, Minister of Foreign Affairs of Sweden Donald J. Trump walks out of the U.S. Capitol to be sworn in as America’s 45th President. (Source: White House Facebook page) Note: I’ve written this from Tromsø, Norway, where I’m covering the Arctic Frontiers conference. A version of this commentary is also scheduled to be published in the Norwegian newspaper Da ...read more

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