* Gregor Mendel: The father of modern genetics, his groundbreaking work on pea plants was not fully appreciated until the early 20th century, long after his death.
* Alfred Wegener: His theory of continental drift, proposed in the early 1900s, was met with widespread skepticism from the scientific community. It wasn't until the 1960s, with the development of plate tectonics, that his ideas were finally accepted.
* Nikola Tesla: A brilliant inventor and engineer, his visionary ideas, particularly on alternating current (AC) electricity, faced resistance from his contemporaries, including Thomas Edison.
* Ignaz Semmelweis: A Hungarian physician who discovered the importance of handwashing in preventing puerperal fever (childbed fever), his ideas were met with hostility from the medical establishment.
* Louis Pasteur: Though now renowned for his contributions to microbiology and immunology, his early work on germ theory was met with resistance from those who believed in spontaneous generation.
It's important to note that this is just a small sample, and many other scientists faced similar challenges throughout history. This highlights the sometimes slow and complex process of scientific advancement, where new ideas can take time to gain acceptance.
