Fat Water Bear Week: A Tardigrade Event in Philadelphia
Meet the Tiniest Contenders at The Franklin Institute
September 27–October 3, 2026 | 10:00 am–12:00 pm, 1:30–2:30 pm, 4:00–5:00 pm
Body Odyssey, 2nd floor
Included with general admission ticket. Members are free.
Celebrate Fat Water Bear Week at The Franklin Institute in Philadelphia, September 27–October 3, 2026. Meet water bears, also known as tardigrades, through live science experiences and microscope viewing, then follow along as these tiny contenders compete for the title of Fat Water Bear Week champion.
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Think you can pick the winner? Cast your vote on Instagram Stories and follow the competition as our tardigrade contenders go head-to-head.
What Is a Water Bear?
Water bears, or tardigrades, are microscopic animals known for their unusual appearance and incredible ability to survive extreme conditions. They're found in environments such as moss, lichen, soil, and leaf litter.
During Fat Water Bear Week, you'll have the chance to learn more about these tiny animals while seeing them up close under a microscope.
Frequently Asked Questions
When is Fat Water Bear Week at The Franklin Institute?
Events will take place September 27–October 3, 2026 at 10:00 am–12:00 pm, 1:30–2:30 pm, and 4:00–5:00 pm.
Where is Fat Water Bear Week located within the museum?
All programming is located in Body Odyssey on Level 2.
What is Fat Water Bear Week?
Fat Water Bear Week is a weeklong celebration of tardigrades, also known as water bears. Inspired by the annual Fat Bear Week tradition, the experience combines science, humor and social media voting at The Franklin Institute.
What are water bears?
Water bears are the common name for tardigrades, microscopic animals that typically measure less than a millimeter long. They get their nickname from their vaguely bear-like appearance.
Are tardigrades actually bears?
Nope! Despite their nickname, tardigrades are microscopic animals that are not related to bears. They're known for their distinctive appearance and remarkable ability to survive extreme conditions.
Can I see a tardigrade at The Franklin Institute?
Yes! During scheduled Live Science sessions in Body Odyssey, guests can see tardigrades under a microscope, with their magnified image projected onto a screen for easy viewing.
Is Fat Water Bear Week good for kids?
Absolutely. Tardigrades are a great way for curious learners of all ages to explore animal anatomy, ecosystems, adaptation, and the science of survival. The facilitated experiences make the topic accessible to young scientists and grown-ups alike.