Where Did Earth's Water Come From?

In the early 1900’s, within a massive observatory hidden amidst the forests of Flagstaff, Arizona, astronomer Percival Lowell made a startling discovery. Peering through his imposing telescope, he claimed to have witness characteristics of Mars which had never been seen before, including evidence of reflective waters, crisscrossing canals and patches of vegetation....

from Top Documentary Films https://ift.tt/2XAY0me