In this timeline, Ma (for megaannum) means "million years ago," ka (for kiloannum) means "thousand years ago," and ya means "years ago."

The Cambrian ( / ˈkæmbri.ən, ˈkeɪm -/ KAM-bree-ən, KAYM-) is the first geological period of the Paleozoic Era, and the Phanerozoic Eon. [5] . The Cambrian lasted 51.95 million years from …

Nov 5, 2022 · Scientists have finally solved a centuries-old riddle in the evolution of life on earth, revealing what the first animals to make skeletons looked like. This discovery was possible …

Jul 14, 2009 · 500 million years ago Fossil evidence shows that animals were exploring the land at this time. The first animals to do so were probably euthycarcinoids – thought to be related to …

Jan 11, 2025 · Cambrian Period, earliest time division of the Paleozoic Era and Phanerozoic Eon, lasting from 538.8 million to 485.4 million years ago. The Cambrian System, named by English …

May 22, 2019 · But otherwise little is certain, especially early in the Phanerozoic, which spans the past 541 million years. Paleoclimate scientists study their own slices of time and use their own …

Feb 19, 2019 · The Cambrian explosion happened more than 500 million years ago. It was when most of the major animal groups started to appear in the fossil record, a time of rapid …

May 3, 2024 · Tarduno and his team’s research suggests that during the Ediacaran Period, the ultraweak magnetic field caused a loss of hydrogen over at least tens of millions of years. This …

Nov 8, 2022 · Science Alert said archaeologists are now getting a close-up look at the early lifeforms around 514 million years ago thanks to a few fortunate fossils from China that beat …

Nov 2, 2022 · An exceptionally well-preserved collection of fossils discovered in eastern Yunnan Province, China, has enabled researchers to solve a centuries-old riddle in the evolution of life …