Let's make this birthday one to remember.

55 years old (Born on June 04, 1969)

Happy Birthday, Zeresenay! Another year older—but what's a few decades when you've spent your career counting in millions? Your groundbreaking discovery of "Lucy's child" not only reshaped our understanding of human evolution but also proved that toddlers have been causing trouble for at least 3.3 million years.

Your tireless dedication and brilliant insights continue to inspire us all. May this birthday be filled with laughter, joy, and perhaps fewer fossilized tantrums than you're used to dealing with. Here's hoping the coming year brings you even more exciting discoveries—though topping Lucy's kid might require digging up an ancient teenager next!