crater
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It was a little tougher 214,000,000 years ago
Above is the best (or the widest) shot I could get of Lake Manicouagan, which is the largest visible impact crater on Earth. Only three (or maybe four) are larger and none are visible. The Manicouagan impact event happened about 214 million years ago, give or take. That was 14 million years before the end… Continue reading
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Thinking past the I-I boundary
For the form of life we call business, we are at a boundary between eras. For biological forms of life, the most recent of these is the K-T boundary between the Mesozoic and the Cenozoic Eras. The Mezozoic Era ended when Earth was struck by an object that left a crater 110 miles wide and… Continue reading