In the popular mind, mass extinctions are associated with catastrophic events, like giant meteorite impacts and volcanic super-eruptions. But the worldâs first known mass extinction, which took place about 540 million years ago, now appears to have had a more subtle cause: evolution itself. âPeople have been slow to recognize that biological organisms can also drive mass extinction,â said Simon Darroch, assistant professor of earth and environmental sciences at Vanderbilt University.
The pectoralis major (/ËpÉktÉËreÉªlÉ¨s ËmeÉªdÊÉr/) (from Latin: pectus, breast) is a thick, fan-shaped muscle, situated at the chest (anterior) of the human body. It makes up the bulk of the chest muscles in the male and lies under the breast in the female.he pectoralis major (/ËpÉktÉËreÉªlÉ¨s ËmeÉªdÊÉr/) (from Latin: pectus, breast) is a thick, fan-shaped muscle, situated at the chest (anterior) of the human body. It makes up the bulk of the chest muscles in the male and lies under the breast in the female.
Rating Newest Oldest. Best Answer: A major is your specialization. A minor is meant to complement your major-your breadth of knowledge isn't as large. You can't have just a minor, but you can have just a major.Often times people choose minors of interest (something they want to study, but don't necessarily want to commit their studies to) or minors that suite their majors or make them more marketable (business minors are common for their versatility).ou can't have just a minor, but you can have just a major. Often times people choose minors of interest (something they want to study, but don't necessarily want to commit their studies to) or minors that suite their majors or make them more marketable (business minors are common for their versatility).