2007年9月27日 · Darwin had little to say about genetics. The connection between evolution and genetics is the subject of the modern synthesis developed in the 1930s. (Modern Synthesis, Huxley, 1942). Darwin of course didn't know about DNA (The Double Helix, Watson, 1980). Darwinian evolution and late 19th century geology are overly focused on gradual change.

2015年2月6日 · To me the only distinction between long term adaptation and short term adaptation is how long they have been around. You could say that an ancient adaptation - for example the endosymbiosis of mitochondria - has 'more effect on evolution' in that it is likely to be more essential than a more recently developed adaptation. This whole distinction ...

2013年7月16日 · The findings underscore the idea that traits we see now-even complex ones, like color vision-may have had neutral origins that sat latent for generations before spreading through populations, Wagner says...If exaptations are pervasive in evolution, he adds, it becomes difficult to distinguish adaptation from exaptation, and it could change the way evolutionary biologists …

2014年2月18日 · So it's all physics: matter behaves in this way or that way, even matter in biological systems, but biological systems represent are specific class of molecular dynamics and physics that has properties most other physical systems in the known universe don't have (replication, adaptation, etc.) and, in my opinion, evolution is a big part of what ...

2009年3月24日 · There are still questions about how evolution works, and cladistics is wide open, but the foundations are solid. We see a massive amount of evolution yearly, especially in viral reassortment; the fossil record allows us to see the same process on organisms with longer generations. The Big Bang theory, on the other hand, is very much in development.

2024年12月6日 · Ah ok, so basically the "time evolution" of an "on-shell" trajectory through phase space is "constrained" from Hamilton's equations. Mostly on-shell and off-shell are used to distinguish between different kinds of path integral evaluations in quantum mechanics.

2024年10月30日 · The only reason there is expansion of the envelope, or evolution of any kind, is that helium "ash" is building up in the core. This increases the gravity acting on the fusing shell, which requires some adjustment of the stellar structure for everything to stay close to balance. This is a form of what one might call "equilibrium evolution."

2014年9月2日 · Current evolution as we see it. Today, we do see evolution happening right now. The best example is the case of bacteria gaining resistance. New bacteria like MRSA quickly mutate and gain resistance to antibiotics. This is an example of evolution in action. It follows that if evolution happens now, it is only logical it happens before and in ...

2025年2月1日 · It simply doesn't square with the discontinuities and randomness that experiments seem to reveal in the real world. There's a reason why von Neumann introduced "measurement" (collapse) as a separate process besides unitary evolution. But it's an uneasy combination and, for some physicists, has created a new "measurement problem".

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