Whiteboard
Whiteboards became commercially available in the early 1960s, but did not become widely used until 30 years later. Early whiteboards needed to be wiped with a damp cloth and markers had a tendency to leave marks behind, even after erasing the board. Dry-erase markers for whiteboards were invented in 1975.
Monterey Bay Aquarium
In 1984, Monterey Bay Aquarium's first attempt to display a great white shark lasted 11 days, ending when the shark died because it did not eat. Through a later program named Project White Shark, six white sharks were exhibited between 2004 and 2011 in the Open Sea community exhibit, which was constructed in the 1990s. Researchers at universities in California attributed the aquarium's success at exhibiting white sharks to the use of a net pen, which gave the sharks time to recover from capture prior to transport. A portable tank used to transport the fish to the exhibit allowed the sharks to swim continuously, which they must do in order to respire. These endeavors led to the first instance of a white shark eating in an aquarium.