Since 2007, coherent catastrophism has received support in the form of physical evidence from various earth sciences associated with the Younger Dryas impact hypothesis, although this evidence is often disputed, and even accepting the YD impact hypothesis, the nature of the impactor is not established.
Coherent catastrophism has received support in the form of physical evidence from various earth sciences. This was since 2007. These various earth sciences are associated with the Younger Dryas impact hypothesis. This evidence is often disputed. The nature of the impactor was accepting the YD impact hypothesis. This was since 2007. The nature of the impactor is not established. This was since 2007.