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It’s an understatement to say that this is a extraordinary time. Uncertainly about the severity and duration of the crisis makes it all the more so.

I think it’s also safe to say that it is difficult for all of us both personally and professionally. …

When it comes to the asteroid threat, we must outperform the dinosaurs

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Above the Yucatan Peninsula, 65 million years ago.

Fighter pilots have a saying — it’s the bogey you don’t see that will generally get you.

This maxim was on full display on February 15, 2013. That day, the astronomical world had its gaze fixed over the eastern Indian Ocean, off Sumatra, where Asteroid 2012 DA14 was due to give the Earth a relatively close shave, missing terra firma by just 17,200 miles, well inside the orbit of the moon (an altitude of 240,000 miles), and even those of geostationary satellites (22,000 miles). The asteroid measured 150 feet across and its approach was well understood, as astronomers had been tracking it for some time. It arrived right on schedule and buzzed the planet just as predicted. The event would likely have made a good story on the local evening news, sandwiched between the weather report and sports scores. But just hours before 2012 DA14 flashed past the Indian Ocean, it was upstaged by a another rock — one with no name. An asteroid about 55 feet across cut a gash in the sky over the Siberian city of Chelyabinsk, Russia. It entered the Earth’s atmosphere at some 40,000 mph and the intense atmospheric pressures tore it apart less than fifteen miles above the surface. The resulting airburst was thirty to forty times the force of the atomic bomb exploded over Hiroshima. …

A (very) brief history of the D Day landings in France

Note: After a few requests to put them all in one place, below is a compilation of several social media entries I posted on Instagram and Facebook on June 6, 2018, the 74th anniversary of D Day. …


Mack Bradley

Father, business owner, writer, #NASAsocial alumnus, #STL Crime Commission member.

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