Sentences with phrase «timescales of human lifetimes»
Currently used to achieve large amounts of energy necessary to launch a craft past Earth's gravitational pull, chemical rockets are inadequate for travel to the stars in timescales of human lifetimes.
http://100yss.org/ Not exact matches
Given that sailor's lives still depend on the accuracy of these charts, this suggests that sea level rise is not global, or it is cyclical on timescales measurable in 1 human lifetime.