A new study suggests animals may have appeared on Earth roughly 200 million years earlier than scientists have long believed, according to Live Science. The finding, reported on Friday, points to an origin of animal life that predates what the fossil record has shown.
Live Science reports that the research pushes back the timeline for when animals first evolved. Coverage of the work has also appeared in YaleNews, Phys.org and Varsity Online, which described the finding as moving back the clock on animal life.
The fossil record has traditionally served as the main evidence for when animals first appeared. The new study indicates that the earliest animals may have existed well before any traces preserved in fossils, according to the reporting. Phys.org framed the result as suggesting animals evolved much earlier than fossil evidence alone would indicate.
The reports do not offer further detail on the methods behind the finding or the specific timeline proposed. What the coverage makes clear is that the study challenges the assumption that the fossil record captures the true starting point of animal evolution.
Researchers will now need to test whether the proposed earlier origin holds up against other lines of evidence. Further scrutiny of the study's methods and any additional fossil or chemical data could confirm or complicate the timeline it puts forward.
