USA TODAY's Chris Woodyard talks to Louis Marton of Canyon Country, Calif., about the 1941 truck he turned into a rat rod.

Carpenter's Bluff Bridge is a unique one-lane structure that stretches over the Red River, spanning the distance between Texas and Oklahoma. Robin Cole Jett 5354 Carpenters Bluff Rd Denison, TX 75021 Website: redriverhistorian.com

These clumsy folks are carrying a wheelbarrow full of dirt. Due to their clumsiness, they drop the wheelbarrow full of dirt onto the manhole below - the guy inside the manhole isn't too happy about it!... http://gags.justforlaughs.com

From implantable keys to fighting cancer, a look at the futuristic technology that could change how our bodies work. theverge.com

FREE FACT: An oblate spheroid is a special case of an ellipsoid where two of the semi-principal axes are the same size. http://facebook.com/minutephysics Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute! Music by Nathaniel Schroeder http://www.soundcloud.com/drschroeder Thanks to Nima Doroud for contributions.