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Illustration by the CDC, reveals ultrastructural morphology exhibited by coronaviruses. Note the spikes on the outer surface of the virus, which impart the look of a corona surrounding the virion, when viewed electron microscopically. A novel coronavirus,

The Top COVID-19 Vaccine Myths Spreading Online

Ice Sledge Hockey, Hockey Canada Cup, USA (left) vs Canada, 2009. UBC Thunderbird Arena, Vancouver, BC, competition site for Olympic ice hockey and Paralympic ice sledge hockey. Vancouver 2010 Olympic and Paralympic Winter Games, Vancouver Olympics

10 Best Hockey Players of All Time

World Data Locator Map: Australia

Is Australia an Island?

VAN, TURKEY - OCTOBER 25: A building and car ruined during the earthquake of Van-Ercis on October 25, 2011 in Van, Turkey. It is 604 killed and 4152 injured in Van-Ercis Earthquake.

What Is an Aftershock?

A mug shot taken by the regional Colombia control agency in Medellin

Pablo Escobar: 8 Interesting Facts About the King of Cocaine

Close up of papyrus in a museum.

Before the E-Reader: 7 Ways Our Ancestors Took Their Reading on the Go

Groups of depositors in front of the closed American Union Bank, New York City. April 26, 1932. Great Depression run on bank crowd

Causes of the Great Depression

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brickwork

Also known as: perpend, throughstone

Learn about this topic in these articles:

use in masonry

In bond
A bond course of headers (units laid with their ends toward the face of the wall) can be used to bond exterior masonry to backing masonry. Headers used in this manner may also be called throughstones, or perpends. Units laid with their lengths parallel to the face of a…
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