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The Student News Site of Clayton High School.

The Globe

The Student News Site of Clayton High School.

The Globe

The Student News Site of Clayton High School.

The Globe

All content by Photo Courtesy of Petra Levin
At Washington University, Professor Dr. Petra Levin uses toothpicks to spread E. coli bacteria so that they form individual colonies on nutrient agar in her lab.

[Photo] Putting A Pause On Progress

Luke Jeans, Photo of the Week Manager
April 15, 2025
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Photo Courtesy of Petra Levin