What do Albert Einstein, Pulitzer Prize-winning music critic Tim Page, and Nobel Peace Prize laureate Muhammad Yunus all have in common? They found success later in life.
The trait isn't uncommon among entrepreneurs. Some are dreamers, others are tinkerers, and still others simply wake up only to realize they no longer like being stuck in a desk job.
Here are four entrepreneurs who blossomed after 40, for the full list click over to Inc.