Category Archives: Uncategorized

Union of Concerned Scientists Issues New “Warning to Humanity”

Photo by Patrick Kelley.

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.

Read/listen to my full story at KJZZ’s Arizona Science Desk:
25 Years Later, Global Scientists Issue Second Warning To Humanity

El Nino CO2 Levels Suggest Grim Carbon Future

Image: OCO-2 /JPL-Caltech/NASA.

The years 2015 and 2016 saw record levels of excess carbon dioxide in the atmosphere, even though human carbon emissions have stabilized in recent years. Now, scientists think they know why.

Read/listen to my full story at KJZZ’s Arizona Science Desk:
NASA: Spike In Atmospheric CO2 Related To El Nino

For Some Dinosaurs, it Wasn’t the Asteroid, but the Aftermath

Image by Don Davis/NASA.

The recent solar eclipse plunged a swath of the U.S. into two minutes of gloom, but it’s nothing compared to the years-long night that almost wiped out life on Earth 66 million years ago.

Read/listen to my full story at KJZZ’s Arizona Science Desk:
Years-Long Darkness Doomed Survivors Of Dinosaur-Killing Asteroid

Bark Scorpion Arose from Rare Genetic Event

Arizona bark scorpion glowing under ultraviolet light. Photo by Bryce Alexander.

More than 450 million years ago, the entire genetic instruction book of spiders’ and scorpions’ common ancestor doubled, according to a genomic comparison of the common house spider and the Arizona bark scorpion.

Read/listen to my full story at KJZZ’s Arizona Science Desk:
Rare Whole Genome Duplication Gave Rise To Arizona Bark Scorpion

Eclipse Programs, Glasses Available at Phoenix Libraries

Image by Vic Viatour.

As Monday’s solar eclipse draws near, many Phoenicians worry they won’t be able to find viewing glasses — or that they’ll get unsafe knockoffs instead. But Phoenix libraries are offering a fun and educational way for kids to get theirs.

Read/listen to my full story at KJZZ’s Arizona Science Desk:
Phoenix Libraries Offer Programs, Eclipse-Viewing Glasses For Kids