How Did Sharks Survive So Many Mass Extinctions?

Sharks have been around for over 400 million years, and in that time have made it through 4 of the 'Big 5' mass extinctions of life. How did they manage this? And will they be able to survive the sixth major mass extinction?

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Sources:
https://web.archive.org/web/200812230...
https://en.wikipedia.org/wiki/Late_De...
https://www.sciencedirect.com/science...
https://www.pnas.org/content/107/22/1...
https://www.geosociety.org/gsatoday/a...
https://www.ncbi.nlm.nih.gov/pmc/arti...
https://www.fossilguy.com/gallery/ver...
http://www.bbc.co.uk/earth/story/2015...
https://pubs.geoscienceworld.org/gsa/...
https://www.nature.com/articles/ncomm...
https://en.wikipedia.org/wiki/Triassi...
https://sciencenordic.com/animals--pl...
https://www.sciencedirect.com/science...
https://journals.plos.org/plosone/art...
https://www.pnas.org/content/112/28/8537
https://science.sciencemag.org/conten...
https://www.newscientist.com/article/...
https://www.nature.com/articles/s4158...

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