Air traffic snarls and communication breakdowns can leave holiday flight plans up in the air. But NASA and the Federal Aviation Administration are working on a system they hope will break the logjam.
City lights drive back the night a little more each year, disrupting ecological cycles, and the switch from orange-yellow sodium lights to bluish-white LEDs might be making the problem worse.
This week marks 25 years since more than 1,700 scientists, led by the Union of Concerned Scientists, issued a “warning to humanity” concerning the costs of continued environmental destruction.
Now, they’ve issued another — this one signed by 15,000 scientists representing 184 countries.
Arizonans were treated to an unusual spectacle Tuesday night as a fireball flashed across the sky around 8:30 p.m.
The American Meteor Society received reports from six states describing the object, which flashed brighter than the full moon before quickly fizzling out.
The Gila River Indian Community Council in September approved plans to reclaim an 80- to 100-square-mile section of the Gila River and floodplain from invasive salt cedar, or tamarisk.
Removing invasive salt cedar reduces the risk of wildfires, but it also offers a chance to restore native plants and wildlife.