Boltysh crater

…to 5,000 years, appears at Boltysh in Ukraine. Its existence raises the possibility that the K–T boundary event resulted from multiple extraterrestrial impacts.

…5,000 years, was discovered at Boltysh in Ukraine in 2002. Its existence raises the possibility that the K–T extinction was the result of multiple bolide impacts. In addition, tektites (fractured sand grains characteristic of meteorite impacts) and the rare-earth element iridium, which is common only deep within Earth’s mantle and…