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That's the message in ASCII computer code "hidden" in the parachute that brought the Perseverance Rover down to Mars surface last week.
The origins of the phrase are an 1899 speech by Theodore Roosevelt, in which he said
"Far better it is to dare mighty things, to win glorious triumphs, even though checkered by failure, than to take rank with those poor spirits who neither enjoy much nor suffer much, because they live in the gray twilight that knows not victory nor defeat."
