A Martian megatsunami – agiant killer wave that may have reached more than 80 stories tall – may have raced across the Red Planet after a cosmic impact similar to the one that likely ended Earth’s age of dinosaurs. Although the surface of Mars is now cold and dry, a great deal of evidence suggests that an ocean’s worth of water covered the Red Planet billions of years ago. Previous research found signs that two meteor strikes might have triggered a pair of megatsunamis about
