Yellowstone National Park's typically quiet geyser is making some noise after spewing garbage dating back to the 1930s. After the geyser erupted last month, employees found a Hamm's beer can, a vintage pacifier, a shoe heel and dozens of coins next to its vent. Live Science was able to put a date on the pacifier, creating a timeline for how long the items had been resting just below the surface. A cinder block, a broken bottle, old signs and cigarette butts were also among the contents barfed up by the geyser. Curators are reminding visitors not to use the springs as a trash can, as they can cause damage.