Immanuel Velikovsky is an example of a recent scientific exoheretic; he did not have appropriate scientific credentials or did not publish in scientific journals. While the details of his work are in scientific disrepute, the concept of catastrophic change (extinction event and punctuated equilibrium) has gained acceptance in recent decades.
Is there an answer to this question (If it cannot be answered, say "unanswerable"): Who's work is widely excepted among scientest today?
unanswerable