Let's make this birthday one to remember.

57 years old (Born on March 20, 1968)

Happy Birthday, AJ Jacobs! May your day be filled with joy, laughter, and absolutely no biblical plagues. Your year of living biblically taught us all that following every rule can lead to some hilarious beard-growing adventures—and perhaps a newfound appreciation for mixed fibers.

From becoming the ultimate human guinea pig in "The Guinea Pig Diaries" to impressively absorbing encyclopedic knowledge in "The Know-It-All," you've shown us how curiosity (and a healthy dose of humor) can make life endlessly fascinating. Here's hoping this birthday brings you another memorable experiment—though maybe skip the stoning part this time around!