Biologic Rhythms from Mammoth Hairs
Author Information
Author(s): Mike Spilde, Antonio Lanzirotti, Clifford Qualls, Genevieve Phillips, Abdul-Mehdi Ali, Larry Agenbroad, Otto Appenzeller
Primary Institution: University of New Mexico
Hypothesis
How do biologic rhythms in mammoth hairs compare to those in modern human hair?
Conclusion
The study found that biologic rhythms in mammoth hairs differ based on geographic location and are distinct from those in human hair.
Supporting Evidence
- Mammoth hair grows approximately 31 cms/year, while human hair grows about 16 cms/year.
- Hydrogen isotope ratios in hair reflect biologic rhythms and geographic location.
- Power spectral analysis revealed distinct growth cycles in mammoth hairs compared to humans.
- Seasonal variations in elemental content of mammoth hair indicate changes in food intake.
Takeaway
Scientists studied mammoth hairs to learn about their growth patterns and how they lived, comparing them to human hair.
Methodology
The study used hydrogen isotope ratios and elemental analysis to assess biologic rhythms in mammoth and human hairs.
Potential Biases
Potential bias in sample selection and analysis methods.
Limitations
The study is limited by the small sample size and the geographic variability of the mammoth hairs.
Participant Demographics
The study included hair samples from four mammoths and two humans.
Statistical Information
P-Value
<0.001
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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