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Long-term effects of such high UV radiation would include skin-reddening, changes in plant growth and genetic mutations for humans and other organisms. And an asteroid has about twice the chance of striking water rather than hitting land. Those odds come from the fact that over 70 percent of the Earth's surface is covered by water.
據(jù)悉，長期面臨輻射可導(dǎo)致皮膚紅化、植物生長發(fā)生改變、人類以及其他有機體的基因變異。而且據(jù)了解，小行星落入海洋的幾率是與陸地相撞幾率的兩倍，原因在于地球70%以上的表面被水覆蓋。
Asteroid hunters have found about 903 of an estimated 1,050 near-Earth objects (NEOs) with diameters of 1 kilometer or greater as of October 1. That still leaves well over 100 objects in the 1-2 kilometer size undiscovered.
據(jù)估計，截至10月初，直徑大于等于1000米的近地小行星約有1050個，行星探測器已發(fā)現(xiàn)903個，而還有100多個直徑為1000到2000米的小行星尚待發(fā)掘。
