Thursday, December 22, 2016

Monumental modeling


Monumental modeling

12/22/2016 12:00 AM EST

Grad student on the Jefferson Memorial

Over the past decade, a dark substance has tarnished the bright white dome of the Jefferson Memorial in Washington, D.C. Despite appearances, it's not just dirt and grime.

The mysterious dark substance, a coating of microorganisms called a biofilm, is showing up on monuments and buildings around the globe. In some cases, it has been on these structures for a long time. It's possible that being exposed to the elements has altered the dome of the Jefferson Memorial over the past ...

More at https://www.nsf.gov/discoveries/disc_summ.jsp?cntn_id=190543&WT.mc_id=USNSF_51&WT.mc_ev=click


This is an NSF News and Discoveries item.

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