Such volcanoes are devastating, but very rare. The last one happened at Toba in Sumatra, Indonesia, 74,000 years ago. The active volcanic system at Yellowstone National Park has resulted in super-eruptions-the most recent happened 640,000 years ago. Yellowstone's volcanism is powered by magma rising from a hotspot.
A biased opinion is based on a preconceived notion or idea about a thing, person or group of people based on personal beliefs. In psychology, a bias is known as a cognitive shortcut.. It is based on the idea that the human brain, in order to conserve energy, naturally looks for shorter paths to conclusions by using what has been ingrained to draw speedy conclusions.
What Is Bias? A bias is a tendency. Most biasesâlike preferring to eat food instead of paper clipsâare helpful. But cognitive shortcuts can cause problems when we're not aware of them and we apply them inappropriately, leading to rash decisions or discriminatory practices. Stereotype threat, for example, is the confirmation of negative stereotypes about another person's race, gender, group, and so on.