12,000 years ago, on the shores of Lake Otero in what is now New Mexico, an epic hunt took place where ancient humans stalked a giant sloth. Evidence of this hunt survives as fossilized tracks.

The illustrated wall graphic was done for White Sands National Park visitor center.

At the height of its power, the Roman Empire stretched from the British Isles to Egypt. To protect its far flung borders, the Empire relied on a vast network of forts, walls, and natural barriers. This map, created alongside National Geographic cartographer, Virginia Mason, was featured in the September 2012 issue of National Geographic.

Awarded Best Thematic Map in the 2012 CaGIS Map Design Competition. 

It may not come as a surprise, but worms in your garden will actually help your soil. In a process called vermicomposting, organic matter is ingested, broken down in the worms digestive track, and excreted as matter teeming with bacteria and nutrients that help plants grow. 

This illustration was done for an NPR on vermicomposting, published on NPR.org in August 2016. 

Illustrated graphic showing how antibiotic resistance spreads in bacterial populations. Published in the December issue of Scientific American. 

Illustrated graphic about the discovery of a particular plant species growing atop kimberlite pipes, the geologic formations that bring diamonds to the Earth's surface. Published in the February 2016 issue of National Geographic Magazine. 

Illustrated infographic describing tropical plants' ability to attract echolocating bats by shaping the echoes of the bats' calls. Featured in the March 2014 issue of National Geographic. Shown is the graphic as it ran in print and four screenshots of the tablet edition. 

Nothing happens without a cause. What began with the first humans leaving Africa over 60,000 years ago has lead to countless journeys, inventions, and discoveries. The same spirit that lead man to first journey across an ocean has also lead man to set foot on the moon. This timeline, featured in the June 2013 issue of National Geographic, traces the paths of human exploration around the globe and beyond.

View larger image. 

Poster for the National Parks Service Alaska Archaeology Month, highlighting the Denbigh, the ancient people of the arctic. 

A look back at the last ten decades of AKC dog breed rankings by popularity. Why the Boston Terrier isn't as popular as it once was is beyond me. 

Published in the February 2016 issue of National Geographic. 

Spot illustrations accompanying the review of J.K. Rowling's Fantastic Beasts in Entertainment Weekly. Published in the November 25 issue. 

Poster for the National Parks Service Alaska Archaeology Month 2016, highlighting the Thule, an ancient people of the arctic.

In Antarctica, volcanoes leak hot, moist gases that melt their way through the ice and escape through natural vents called fumaroles. The escaping moisture instantly freezes in the cold air and is sculpted by wind into gnarled towers of ice. Below the surface, in hollowed caverns that can stretch for hundreds of feet, microbiologists search for microbes that could be analogous to alien life. This cutaway drawing was done for the July 2012 issue of National Geographic Magazine. Maps by Martin Gamache. 

Illustrations for an infographic in National Geographic digital edition.