Jeff Havig

Jeff Havig

Billions of life forms left us clues from more than a billion years ago

By: - September 6, 2022

The geyser cones of Yellowstone are made up of material called sinter—a form of silica precipitated from hot water. When looking at the sinter under a powerful microscope, strange forms are revealed that are related to some of the earliest life forms on Earth. When visiting Yellowstone National Park you may spend time exploring places […]

Where the color runs out: Why some Yellowstone pools have a lot of color, while others don’t

By: - December 27, 2021

Yellowstone hot springs are renowned for their amazing colors, many of which are created by photosynthetic processes. The colors vary depending on water temperature and chemistry. Hot springs are natural laboratories that allow us to explore how life is able to adapt and thrive in what humans consider to be extreme conditions. Heat tolerance, especially, […]