Logan is a name with Irish origins. The meaning of the name Logan is from the hollow. Common nicknames for Logan include Loag and Lo. Famous Loganâs include athletes Logan Bailly, Logan Coutre, Logan Kensing, and Logan Mankins.
During the Cambrian explosion, the atmospheric oxygen levels increased by up to 10 percent, and prior to that time the living creatures roaming the Earth were typically small, simple and often single-celled.
Around 530 million years ago, a wide variety of animals burst onto the evolutionary scene in an event known as the Cambrian explosion.In perhaps as few as 10 million years, marine animals evolved most of the basic body forms that we observe in modern groups.he term explosion may be a bit of a misnomer. Cambrian life did not evolve in the blink of an eye. The Cambrian was preceded by many millions of years of evolution, and many of the animal phyla actually diverged during the Precambrian. The animals of the Cambrian did not appear out of thin air.