According to Darwin, there was only 1 species of Finch bird in Galapagos. Then Darwin argued that due to diet adaptation and natural selection, their beak changes causing new species--which is confirmed by John Gauld at the Geological Society of London.
In contrast, Weismann's and his mouse proofed that environment factor won't effect next generations.
Don't Weismann's argument contradicts Darwin? Ok, say that the Finch bird adapts (and killing the one who don't) with their diet. Their beak changes. But when these Finch bird breeds, their new generation's beak should reset to normal beak again.
The reason I asked this reason is because one article said that our teeth are changing due to overbites using utensils(1). However, not everyone use eating utensils. Indian mostly used finger. Indonesian don't really care whether we use our hand or spoon. If this trend keeps happening in the future, won't human evolve into two species? Homo sapien and Homo spoon (pun intended.)
Or am I mixing Darwin with Lamarck?