Let's make this birthday one to remember.

81 years old (Born on July 04, 1943)

Happy Birthday, Adam Hart-Davis! May your day be filled with more excitement than a Roman aqueduct demonstration and brighter than the neon jacket you famously wore while pedaling through history. Your knack for making science accessible—and hilarious—has inspired countless curious minds to appreciate everything from steam engines to sanitation systems.

From uncovering local heroes who changed our world, to enthusiastically explaining exactly "What the Romans Did for Us," you've made learning delightfully entertaining. Here's hoping this year brings even more fascinating discoveries (and perhaps fewer toga mishaps). Cheers to another orbit around the sun—you truly are one of history's greatest hits!