I plotted our sun's course through space to discover that our sun was born in the constellation Orion. After the planets were formed Earth was covered with a five-mile-thick coating of ice one billion years. We eventually drifted near the Sirius multiple star system and little Sirius B (1.5 solar masses) grabbed hold of our sun putting it in orbit around Sirius A. During the rein of the dinosaurs the atmospheric pressure was around 30 pounds per square...