Comet Impact -

: Long-period comets can be pulled apart by the sun's gravity before reaching Earth, potentially hitting as a "cluster" of fragments rather than a single body.

What Is a Comet? | NASA Space Place – NASA Science for Kids Comet Impact

Scientists have identified several points in history where comet impacts may have reshaped Earth's climate and human society: : Long-period comets can be pulled apart by

A comet’s potential for destruction is defined by its mass and speed. Comet Impact