If you’ve ever had a math or science joke go over your head while watching “Futurama,” you’re not alone, as showrunner David X. Cohen had his writers follow a 1% rule. In a 2007 interview, he stated, “As long as it doesn't derail the enjoyment of the 99 percent, 'Futurama' will make a joke tailored to the nerdiest 1% of its audience.”