Scientists say the rise of algae triggered one of the most profound ecological revolutions in Earth’s history, without which humans and other animals would not exist. Photo: AFP/NasaMelbourne: Scientists have solved the mystery of how the first animals appeared on Earth, a pivotal moment for the planet without which humans would not exist. “Before all of this happened, there was a dramatic event 50 million years earlier called Snowball Earth,” he said. Co-lead researcher Amber Jarrett discovered ancient sedimentary rocks from central Australia that related directly to the period just after the melting of Snowball Earth. “We immediately knew that we had made a ground-breaking discovery that snowball Earth was directly involved in the evolution of large and complex life,” said Jarrett.

Source: Mint August 17, 2017 13:52 UTC