An Asteroid Strike So Big It Melted Part of Australia But the Crater Vanished. Scientists in South Australia have uncovered black glass fragments called tektites, tiny pieces of rock melted in an asteroid impact eleven million years ago. The evidence shows an explosion powerful enough to vaporize part of the continent, yet the crater that caused it has never been found. This short documentary follows the investigation from remote desert fieldwork to isotope analysis at Curtin University, tracing