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.
Cultural Bias is interpreting and judging perceived through someone's own culture. In other words, a person may be biased towards someone else because they do not fit into that persons own culture, or they may be different.  The meaning of bias is prejudice that is against or in favor of a  person, thing or group compared with another in a way considered to  be unfair. 5 people found this useful. Notyouraveragedummy ...