Systemic weed-killer, like those made with glyphosate, should be applied directly to the weed you want to get rid of. Do not apply these products to your entire lawn. Glyphosate products kill all vegetation and should only be applied directly to the leaves of the dandelion.
That's one giant leap! Alan Eustace, a senior vice president at Google, set a new world record today by completing the highest-altitude skydive yet--parachuting from 135,908 feet (or 25 miles) above Earth. The record was previously held by daredevil skydiver Felix Baumgartner, who leaped from 24 miles above Earth in October 2012.
Earth is ensnared today in a thick spider web of orbits. Satellites with different assignments fly at different altitudes: U.S. space shuttles are manned satellites of Earth. They usually fly at altitudes around 200 miles above Earth. Rarely, they fly near 400 miles altitude. Russia's orbiting space station Mir is another manned satellite. It maintains its own orbit just above 200 miles altitude. Russian and American navigation satellites guide ships at sea from 100 to 300 miles altitude.