A 500-million-year-old sea squirt is the evolutionary clue we need to understand our humble beginnings

With no teeth, bones, or shell, this ‘watery sack’ is a rare fossil find that tells us a lot about the history of animal life.

Related Keywords

Massachusetts ,United States ,Harvard University ,Pomona College ,California ,House Range ,Utah ,Karma Nanglu ,Natural History Museum Of Utah ,Nature Communications ,Marine Biological Laboratory In Woods Hole ,Natural History Museum ,Robert Gains ,Marine Biological Laboratory ,Woods Hole ,