Death from the Skies!

My most recent read was from astronomer Phil Plait, who writes the Bad Astronomy blog over at Slate. "Death from the Skies" chronicles all of the possible ways that our planet, and life as we know it, could be destroyed by non-terrestrial natural events. This is definitely not light reading nor does it always perk you up, but it is funny, highly informative, and humbling. Plait's description of our solar system, galaxy, and universe help you to appreciate our position in the cosmos. But how do we survive? Here's how.

Plait covers a wide range of deadly outer space culprits in an attempt to show you just how powerful nature is. The list includes: gamma ray bursts from black holes, solar flares/coronal mass ejections, asteroid impact, comet impact, galactic collision (that's a slow death), and many others. Each chapter starts with a fun little 2-3 page story of humans observing these things from Earth, and they can be a bit scary. After that, the writing is filled with excellent science writing mixed with Plait's clever humor. You come away from this book with far more knowledge of nature than just what can kill us. Plait does an excellent job of explaining how so many different natural forces work, from gravity to chemistry to geology to quantum mechanics.

Here's the good news: most of these things are not going to kill us. The chances of gamma ray bursts or galactic collisions happening are slim. However, the two chapters that I enjoyed the most are actually the chapters the tell the story of our two most likely killers: solar radiation and asteroid/comet impacts.

Plait makes a great case near the end to increase funding towards protecting our planet against solar radiation and impacts from extra-terrestrial bodies like comets and asteroids. There are some great ideas, scientists, and programs out there that just need more funding to get their plans off the ground. A coronal mass ejection could wipe out our power grid and send us plunging into medieval times. It could even damage our ozone layer, which leads to huge long-term problems. And we all know what an asteroid or comet impact could do. The dinosaurs know all about that. But we can prevent these, the most likely problems, if we just work harder at it.

This was a fun, engaging read that I recommend to folks who enjoy a good science book, especially those of you who enjoy astronomy.