Adjunct professors are not a new presence in American universities. They have been around since the 1970s. But as of recently, their numbers spiked and they join the ranks of other low-paid professions such as retail employees, food service workers, call center operators. As much as 76% of faculty employed in American colleges and universities are now part-time workers on limited term contracts. For a deeper look into the adjunct crisis plaguing American universities today, check out the following infographic from Online-PhD-Programs.org.