1 Billion-Year-Old Fossil Could Be The Oldest Multicellular Animal on Record

A teeny tiny fossil found in the Scottish Highlands could be a missing link in the evolutionary history of animals.

Dated to around a billion years ago, the microfossil shows evidence of two distinctly different types of cells, and it seems to belong to an ancient organism somewhere between unicellular and multicellular animals. This makes it possibly the oldest fossil of its kind on record, a discovery that could provide insight into how and where animal life evolved. Read the free article.