Featured in airflow
Redesigning Santa’s Sleigh For Aerodynamic Efficiency
Kris Kringle’s ride is dragging him down
Big Pic: Fluorescent Oil Swirls Over An Experimental Aircraft
Visualizing airflow in a wind tunnel
There’s Alien Gas Flowing Through New York City’s Subways
No need to fear, though: it's an experiment to see exactly how gases are dispersed through the hundreds of miles of New York City subway tunnels.