The Rise of Oxygen in the Earth's Atmosphere: #9. Jay Kaufman said that while scientists cannot collect and study samples of the ancient atmosphere. they can "collect rocks that were formed... under that atmosphere." why are scientists able to learn about the ancient atmosphere by studying the rocks that came into contact with the ancient atmosphere?

china unilaterally claims the entire south china sea as sovereign territory, then builds artificial islands to bolster its claim. it suddenly activates an air defense identification zone over the east china sea, and threatens to down any aircraft that does not report its position. it builds roads into indian territory, then redraws the maps to show that it is actually chinese territory. the people's republic under president xi jinping is quickly becoming the bully of asia.

the word that best sums up the tone of the newspaper regarding the treaty of versailles is resentful.

the award is named for an american naval historian and theorist, rear admiral alfred thayer mahan, united states navy who, through his writing, provided stimulus and guidance to those who share in the defense of the nation.

the constitution gives congress the power to regulate commerce "among" the several states.