These Animals Were Righties Long Before Hands Even Evolved

Researchers have identified evidence of right-handedness in the Ediacaran bilaterian Spriggina floundersi. This creature, which lived approximately 550 million years ago, represents the earliest known instance of an animal demonstrating a directional preference before the evolution of limbs.

Coverage from outlets including Nature, The New York Times, CNN, Phys.org, and New Scientist emphasizes that this finding pushes the known timeline for behavioral handedness back to the earliest stages of complex animal life. The analysis specifically focuses on the worm-like, motile organism's tendency to turn toward the right.

Scientific discussion remains focused on the implications of this trait in the animal kingdom. Ongoing inquiry seeks to understand how this early behavioral preference relates to the broader development of symmetry and body plans in ancient organisms.