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The Seven Wonders of Canada

RIO DE JANEIRO, Brazil: An Indian tribe that has had no formal contact with Western civilization has been located in a remote Amazon region, federal authorities said Friday. The Metyktire tribe, with about 87 members, was found last week in … Continue reading →

Is gravity the same over the surface of the Earth? No — it turns out that in some places you will feel slightly heavier than others. The above relief map shows in exaggerated highs and lows where the gravitational field … Continue reading →