Depends on how pedantic you want to be about "speciation". Humans have tons of adaptation just across ethnicities that likely originate in random mutations, sickle-cell anemia being an obvious one. If you're asking for full species change in a laboratory environment (ignoring the fact that what constitutes a "species" is somewhat arbitrary), there have been many studies on that: https://en.m.wikipedia.org/wiki/Laboratory_experiments_of_sp...
Claiming that the science is bad because the time scales are large is to discount any hypotheses on large time scales. That blows away nearly all of astronomy and huge potions of geology. That's ridiculous. We can clearly learn about things that have happened in the past by piecing together the mountains of evidence that are available.
Claiming that the science is bad because the time scales are large is to discount any hypotheses on large time scales. That blows away nearly all of astronomy and huge potions of geology. That's ridiculous. We can clearly learn about things that have happened in the past by piecing together the mountains of evidence that are available.