Arthur became father to Flaco, a common North American lizard. Most storylines have him playing second-fiddle to his duck "father", but in one extended plotline, he became a Hollywood producer for CSI. He has also won the Pentathlon in the Olympics, earned a Mexican pilot's license, gone to space as a cosmonaut from Baikonur, and dated Betty White in São Paulo. Flaco speaks in a characteristic "squee" sound, which only Arthur can understand (other characters have described Flaco's voice as "...a series of high-pitched helium balloons"). Oso: is Sheldon's pet pug, a whirlwind of energy. Oso was given to Sheldon as a Christmas present in 2005. Oso is mostly shown running around in circles, constantly barking (or, as it is termed in the strip, "hyping"), and acting as "Rex Chestington's" horse. Dante: is one of Sheldon's human friends, an aspiring artist. Seen extensively in the earlier days of the strip, Dante now only makes occasional appearances. He enjoys hanging out with Sheldon and doing regular 10-year-old-kid stuff (as much as that's possible when your best friend is one of the biggest, most successful nerds on the planet). The two have done everything from making sandcastles to playing superheroes and villains to re-enacting the British battle with the Spanish Armada. In one comic, it is shown that he is lactose intolerant. Emily: is Sheldon's newest friend, moving into their neighborhood during 2011. She is obsessed with theater and often quotes the works of Shakespeare throughout several appearances. Though she enjoys stage acting Emily reluctantly admits that stage work is "the worst kind of job to endure." Her pet cat, Li'l Butter, appears in several other comics- frequently in danger due to his sheer stupidity. Characters and persons from popular culture and real life also feature. Strips will occasionally feature Kellett himself and his real-world exploits as opposed to the fictional Sheldon universe. Books / Book reviews Cartoon compilations published to date Still Got It: The Seventh Sheldon Collection Living Dangerously With Saturated Fats: The Sixth Sheldon Collection Nerds On Parade: The Fifth Sheldon Collection Pugs: God's Little Weirdos A Blizzard of Lizards: The Fourth Sheldon Collection 62% More Awesome: The Third Sheldon Collection The Good, The Bad & The Pugly: The Second Sheldon Collection Pure Ducky Goodness: The First Sheldon Collection A Well Balanced Meal: The Very Best of: Four Food Groups of the Apocalypse Book reviews Syracuse Post-Standard Syracuse Post-Standard