Answer | Crossword Clue |
---|---|
AEONS | How long it takes mountains to form |
EONS | How long it takes mountains to form |
EONS | How long it takes canyons to form |
MSEC | How long it takes light to travel 186 mi. |
NSEC | About how long it takes light to travel a ft. |
EON | How long it might take for a mountain to form |