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Or maybe there is no purpose, which is why, through natural selection, they ended up with tiny arms.
by Mikeb85 4y ago
Or maybe there is no purpose, which is why, through natural selection, they ended up with tiny arms.
- Beltalowda 4y agoThe thing is that they seem to have been quite strong, and didn't really diminish further over time (insofar the fossils we have can tell us), which doesn't really fit with being purely vestigial.
- rhdunn 4y agoI wonder if the strength was to help pin down struggling prey. The small arms would then be designed for aerodynamics -- to not slow the T. rex down when running toward its prey -- but also help out when capturing it. That would prevent them diminishing further over time and find that optimal length for both competing requirements.
- kibwen 4y agoThe article mentions this possibility.
- Tagbert 4y agoIt wasn’t just T. rex that had reduced arms size. Other similar species evolved the small arms, too, so it wasn’t just a fluke.
- ctf1er 4y ago> so it wasn’t just a fluke or gills