“The objectives of the George E. Brown, Jr. NEO Survey Program are to detect, track, catalogue, and characterize the physical characteristics of NEOs equal to or larger than 140 meters in diameter with a perihelion distance of less than 1.3 AU (Astronomical Units) from the Sun, achieving 90 percent completion of the survey within 15 years after enactment of the NASA Authorization Act of 2005. The Act was signed into law by President Bush on December 30, 2005.”
Whichever group of astronomers, scientists and assorted world-shakers is correct, they seem to agree on the danger and the need to plan for a response. As if we didn't have enough to worry about already. It is time to listen to Chicken Little: the sky might fall. We now have or could have methods to protect the current version of Earth without needing an evolutionary reboot — “restart” for Mac-lovers.