Polish footprints cause Tiktaalik trouble
Several years ago, the paleontological world heralded the discovery of a fossil
called Tiktaalik roseae. Some scientists claimed it as a perfect missing link
between fish and amphibians, and so it started appearing in school and
university textbooks. However, the discovery of a series of footprints in
Poland, made by a four-legged animal, has changed everything. That's because
these foot prints were dated according to the same evolutionary ideas at 18
million years older than Tiktaalik. Therefore, from an evolutionary perspective,
if four-legged animals existed before Tiktaalik, then Tiktaalik cannot be the
transition between fish and four-legged land animals that it was claimed to be.
Indeed, these footprints are so significant that they have prompted some
scientists to say: "we thought we'd pinned down the origin of limbed tetrapods.
We have to rethink the whole thing."
Isn't it amazing how just a little bit of new evidence can completely undermine
a neat evolutionary story?