Air currents can be caused by differences in temperature, pressure, or impurity concentration. Temperature differences can cause air currents because warmer air is less dense than cooler air, causing the warmer air to appear "lighter." Thus, if the warm air is under the cool air, air currents will form as they exchange places.

Ali Newman (born Jason Newman in 1978), better known by the stage name Brother Ali, is an American hip hop artist signed to Rhymesayers Entertainment.

Brother Ali was born in Madison, Wisconsin, and spent his early childhood moving from city to city in the Midwest (mostly in Michigan). Ali's family settled in Minneapolis, Minnesota, in 1992. He attended Robbinsdale Cooper High School in New Hope, Minnesota. He has a son, Faheem, from his first marriage, and remarried in 2008. On the song "Real As Can Be" off his [EP] "Truth is Here" he says he also has a daughter on the way. According to the song "Fresh Air" on his September 2009 album Us, he goes on to say "Just got married last year/ treated so good that it ain't even fair/ already gotta boy now the baby girl's here/ Bought us a house like The Berenstein Bears." He has family in the Minneapolis area. Brother Ali takes family very seriously and sees it as a major part of life.

Ali was born with the rare genetic condition of albinism, a disorder characterized by a lack of pigment in skin, eyes, and hair. Brother Ali often makes fun of the media's constant urge to mention his condition in the first lines of their reviews or newspaper articles. He is also legally blind which is caused by his albinism.