He claims that popular artists such as Adele, Jason Aldean and Wiz Khalifa are making more than $1 million every year, while some -- like Drake and Lil Wayne -- are raking in almost $3 million annually.
The University of Queensland pitch drop experiment, demonstrating the viscosity of bitumen. The pitch drop experiment is a long-term experiment that measures the flow of a piece of pitch over many years. Pitch is the name for any of a number of highly viscous liquids that appear solid, most commonly bitumen. At room temperature, tar pitch flows at a very low rate, taking several years to form a single drop.
However, water vapor can also be one of the most abundant gases! The maximum amount of water vapor air can hold is 4%, so water vapor could be number 3 or 4 on this list. On average, the amount of water vapor is 0.25% of the atmosphere, by mass (4th most abundant gas). Warm air holds more water than cool air.