Cecilia writes, "I am working on my PhD in wildlife population genetics, and I can trace my passion for my research to a moment when I was in elementary school and we learned about the extinct dodo bird from Mauritius Island. At first, I could not understand what “extinct” meant, but as the concept sunk in that I would never see this bird, and no one else would ever see it again, I felt a deep sadness and sense of loss. Recently, as I was slogging through field and lab work and my ambition started sagging, I decided to get a dodo tattoo to remind myself why I chose this path. Extinction is forever, and we never know what we’ve lost until it’s gone. Some researchers believe that the dodo was the prime seed disperser for the tambalacoque tree that is declining in numbers because there hasn’t been a dodo around for over 300 years to abrade the seeds. If this is true, it would be a succinct example of how extinctions reverberate through ecosystems. I hope that my work will help prevent future extinctions of wildlife." Click here to go to the full Science Tattoo Emporium.