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  **footnote: Click on the video to watch. Need to know what a coral is? Read our handy guide below:


A coral is an animal. It is the thin layer of living tissue that covers a hard structure called the coral skeleton.


The coral builds this structure layer by layer by causing calcium carbonate (a.k.a. limestone) to be deposited on the existing skeleton. Coral structures can grow to different shapes, depending on the species. Some look like boulders, others like tree branches or even heads of lettuce.

Most corals get their color from algae that live inside the coral tissue. The algae have a symbiotic relationship with the coral: the coral hosts the algae and, in exchange, the algae take energy from the sun (through photosynthesis) and share it with the coral.


Coral bleaching occurs when this symbiotic relationship breaks down and the algae is ejected from the coral.


Kate Furby is a Marine Biology grad student at the Scripps Institution of Oceanography, U. California San Diego. In the video above, she explains her research of looking at how coral reefs recover from these catastrophic events.


Using a rig she calls the 'Photomegatron', Kate surveys coral reefs in different parts of the world, looking at how some species of coral are seemingly wiped out by a bleaching event, and then slowly come back from the dead.

Click Here to see the video.

 
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WHAT'S NEW
 
11/2/2020
NEW BOOK! - My new book Frequently Asked Questions About the Universe comes out Nov. 2nd 2021! Pre-order your copy today! Makes a great gift!




9/9/2020
NEW TV SHOW! - Check out ELINOR WONDERS WHY the new animated TV show for young kids I co-created! It's about Nature and encouraging kids to follow their curiosity.



5/14/2018
20 YEARS! - PHD Comics turns 20! We are celebrating by Kickstarting a new book, having a huge sale and offering custom comics and cartoons! Join the fun by clicking here!




11/25/2017
The PHD Store - is back online! Need a gift for the holidays? Why not a book, mug or shirt that matches their level of procrastination sophistication?


5/9/2017
WE HAVE NO IDEA Release! - My new book is now on sale! Order it now!

And check out the book tour map and come see us at one of many fun events!



3/26/2016
Free excerpt from The PHD Movie 2! - Watch this free clip from the movie that Nature called "Astute, funny"!




10/26/2015
Watch the new movie! - The PHD Movie 2 screenings are in full swing! Check out the schedule to catch the screening nearest you.


2/14/2015
Filming is done! - Take a sneak peek behind the scenes of the new PHD Movie 2:



Coming to Campuses this Fall!
Stay tuned for updates on how to organize a screening at your University.


1/24/2013
The Science Gap - Watch Jorge's TEDx Talk:











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