Traces of that cosmic impact could be found all over the planet in the form of vast meteorite craters, but the main evidence was in the sky.

The survey," the team wrote, "has the potential to alter fundamentally the way we view the threat of cosmic impacts.

This group points to four enormous chevron sediment deposits at the southern end of Madagascar, containing deep-ocean microfossils fused with metals typically formed by cosmic impacts.

The problem is knowing how to distinguish the scars of cosmic impacts from those made by volcanoes and earthquakes and gentler processes like sedimentation and glacial action.

"Australian Aboriginal Geomythology: eyewitness accounts of cosmic impacts?"

Get in line behind the hypothesis that life started on Mars and was blown here by a cosmic impact.

On close inspection, the chevron deposits contain deep ocean microfossils that are fused with a medley of metals typically formed by cosmic impacts.

The cores contain melted rocks and magnetic spheres with fractures and textures characteristic of a cosmic impact.

His chapter topics range from tsunamis, earthquakes, volcanic eruptions, and cosmic impacts to financial crashes and pandemics.

Don't wrong the meteorite: Ted Nield thinks it's time to reassess our attitude to cosmic impacts.