See also: https://en.wikipedia.org/wiki/Australasian_strewnfield https://en.wikipedia.org/wiki/Australasian_strewnfield (debris over 10% to 30% of the Earth's s

See also: https://en.wikipedia.org/wiki/Australasian_strewnfield https://en.wikipedia.org/wiki/Australasian_strewnfield (debris over 10% to 30% of the Earth's surface from an impact ~788,000 years ago). Smaller, for sure, but very recent and large enough for "nuclear winter" type scenarios.