2. According to the video, World War I saw the first US Presidential trip to Europe. Which American President made this trip AND for what reason?
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What group has historically made up the largest portion of immigrants in mexico?

The great scientist alfred wegener proposed that continents have moved, while other scientists such as t.c.chamberlin argued against wegener. wegener's ideas eventually won, and are now widely accepted, because: a) wegener's ideas were more beautiful, and so were favored by the intellectual elite.b) wegener's ideas did a better job of predicting the results of new observations and experiments.c) wegener's ideas appealed to dead white european males, whereas chamberlin's didn't.d) wegener's ideas appalled dead white european males, and we all know that in this politically correct era,dead white european males cannot get a fair shake.e) wegener won the nobel prize.

What are two australian geographical features that hindered early exploration? western plateau gulf of carpentaria great barrier reef great dividing range