Vanished

On July 9, 1845, two months after leaving Greenhithe, England, Warrant Officer John Gregory wrote a letter to his wife from Greenland describing his first sighting of whales and icebergs.Gregory, who had never been at sea before, was on…

"This means that Mars has been dry for a long time," said Eva Scheller, a Caltech PhD student who was the lead author of the science paper.Today there is still water equivalent to a global ocean 65 to 130 feet deep, but that is mostly…