What do you think of miracles?
I don't think that they still happen but I believe they did during Bible times. Many people are skeptical because they can't grasp anything beyond their own scope of understanding.
Think of it this way: A color blind person can't see greens and reds. He has no comprehension what they look like. But they still exist.
We don't understand miracles. But centuries ago, we would have thought someone was crazy if they said we would travel to the moon or that people would be able to communicate with someone on the other side of the world.
Some say that miracles defy science but if there is a God, he created the laws of science and can therefore sidestep them if he so chooses.