Imagine that scientists have discovered a new planet that is apparently devoid of life but has ice caps located at the poles. these ice caps reveal that the planet's atmospheric o2 levels sharply increased about 1,000,000 years ago but then quickly dropped 50,000 years ago. what could account for these changes in atmospheric o2 levels?

Uncle tom's cabin started out as a series of articles printed in the national era, a newspaper.

Major river of southeast asia flowing through laos thailand vietnam and cambodia

Need this asap! geography 10 points! will mark brainliest! (this is a webquest < i'm bad at these) answer each question below thoroughly (3-4 sentences each): 1) has international aid done more harm than good for the people of africa? 2) what are the benefits of international aid? 3) what are the problems with international aid? 4) what are the alternatives to international aid? 5) what do you think is the best approach to offer international aid? whoever answer accordingly will get brainliest, youuu humans!