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Is Earth Gaining Mass Or Losing Mass?

In Earth by Brian Koberlein5 Comments

We generally think of the Earth as having a constant mass. On a basic level that’s true, but the Earth’s mass does change very slightly. So is it’s mass increasing or decreasing? The short answer is we don’t know.

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Star Trekkin

In Earth by Brian Koberlein0 Comments

You may have heard about a “Star Trek-like” shield that scientists have found surrounding the Earth. That’s because the University of Colorado Boulder shamefully stated as much in a press release, and websites all over the world would rather copy and paste than actually do science journalism. The press release was promoting a new paper in Nature which looks at properties of the Earth’s radiation belts.

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Thor’s Hammer

In Earth by Brian Koberlein0 Comments

Imagine if a Tunguska event occurred every 5 years or so. Every few years, and some part of the planet gets a crater, or an airburst. Most would be in remote areas, but some wouldn’t. Of course we know that meteors follow a power law distribution in size distribution. So for every Tunguska event, there would be thousands of Chelyabinsks. So perhaps 200 of them every year. Then there are the larger ones. Big impacts creating 10km-wide craters every century or so. And the ever larger ones every millennia. Now imagine Earth gets pummeled at this rate for 200 million years.