http://www.nytimes.com/2014/03/04/science/when-trilobites-ruled-the-world.html?_r=0

http://www.nytimes.com/interactive/2014/03/04/science/trilobites.html

Momma needs a tattoo, stat.  http://www.nytimes.com/2014/03/04/science/when-trilobites-ruled-the-world.html?_r=0

http://www.nytimes.com/interactive/2014/03/04/science/trilobites.html

Momma needs a tattoo, stat.  http://www.nytimes.com/2014/03/04/science/when-trilobites-ruled-the-world.html?_r=0

http://www.nytimes.com/interactive/2014/03/04/science/trilobites.html

Momma needs a tattoo, stat.