100-million-year old skeletons are what make these world-famous cliffs unusually white

The White Cliffs of Dover are stunning natural phenomena that get their signature colour from dead algae.

Produced by Arielle Berger. Original reporting by Jessica Orwig.

Follow BI Video: On Twitter

Business Insider Emails & Alerts

Site highlights each day to your inbox.

Follow Business Insider Australia on Facebook, Twitter, LinkedIn, and Instagram.