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Because most diversity and biomass on Earth is microbial, and thus difficult to measure, recorded extinction events affect the easily observed, biologically complex component of the biosphere rather than the total diversity and abundance of life. Based on the fossil record, the background rate of extinctions on Earth is about two to five taxonomic families of marine animals every million years.

Marine fossils are mostly used to measure extinction rates because of their superior fossil record and stratigraphic range compared to land animals.

The labels of the traditional "Big Five" extinction events and the more recently recognised End-Capitanian extinction event are clickable hyperlinks.

His son Matthias Francisco Hohner belonged to the first generation of direct descendants who did not enter into the family business.

Many direct descendants of the founder are still active as members of the "Deutsches Harmonika Museum" and the "Hohner'sche Familienverein". Technically named the Marine Band 1896/20 for the year it was introduced and the twenty reeds it possesses, it has been the basis of a number of Hohner's harmonicas over the years.

The Great Oxygenation Event was probably the first major extinction event.

Since the Cambrian explosion five further major mass extinctions have significantly exceeded the background extinction rate.

But he shows off his skills on social media just the same.

Last modified 01-Sep-2019 17:36