It has been confirmed that water exists on the Red Planet, just in time. When I happened upon this Earth in 1930 the population in the USA was 122,755,000 people, and world population was 2,300,000,000.
In 2015 population, the USA increased to 322,000,000 folks -- and world population has exploded to 7,276,000,000 ... with one person born every eight seconds in the USA.
Since we are rapidly depleting our natural resources on both land and sea, hopefully Elon Musk of Tesla and Space-X fame will hurry with his planned manned trips to Mars. Hope he has plenty of room.