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.
Synonyms: bias, jaundice, prejudice. These verbs mean to influence in a particular, often unfavorable way. To bias is to cause to incline toward or away from something or someone: claimed that the ruling was biased against low-income workers; was biased by experience in favor of stronger regulation. bias may be favorable or unfavorable: bias in favor of or against an idea. prejudice implies a preformed judgment even more unreasoning than bias, and usu. implies an unfavorable opinion: prejudice against a race. Past participle: biased/biassed. Gerund: biasing/biassing.