These Animals Were Righties Long Before Hands Even Evolved
New fossil analysis identifies behavioral handedness in the 550-million-year-old organism Spriggina floundersi, marking the earliest evidence of the trait.
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The brief
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.
Synthesized by PULSE from the headlines below under a strict no-invention contract. Updated 125d ago.
Quick answers
What organism showed evidence of right-handedness?
The organism is identified as Spriggina floundersi, a motile bilaterian from the Ediacaran period.
How old is the fossil evidence?
The findings are dated to approximately 550 million years ago.
Why is this finding significant?
It represents the oldest known evidence of behavioral handedness in an animal, predating the evolution of hands.
Coverage (6)
- Earliest animal with a head was also the oldest known ‘righty’ CNN · 127d ago
- Ancient fossil may reveal animal kingdom's earliest right-handedness at 550 million years old Phys.org · 127d ago
- A worm that lived half a billion years ago preferred turning right New Scientist · 127d ago
- Earliest evidence of behavioural handedness in the Ediacaran motile bilaterian Spriggina floundersi Nature · 127d ago
- Earliest animal with a head was also the oldest known ‘righty’ CNN · 127d ago
- These Animals Were Righties Long Before Hands Even Evolved The New York Times · 127d ago
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