S. Witman, Author at Eos

Tracing the Steps of Hydrothermal Activity in Hrad Vallis, Mars

Conditions that formed Amazonian age valleys may have been hospitable to microbial life.

Cosmic ray neutrons probe soil moisture in the Great Plains.

Lacking light and energy, under-seafloor microbes rely on ancient organic materials to survive.

Defining the chemical relationships between water, sediment, and organisms that thrive beneath riverbeds.

Wildfires may have driven a critical ecosystem transition in Tasmania’s Lake Vera more than 800 years ago.

Scientists trace severe storms’ effects through tree ring growth patterns.

A network of buoys provides a first glimpse of the seafloor beneath a volatile Italian caldera.

In Sweden’s wet heathland, scientists see how a sensitive ecosystem adapts to rising global temperatures.

Polar amplification could counteract weather patterns shifting toward the poles.

Data gaps obscure the full extent of deaths caused by heating homes with wood and other solid fuels.