Looking for Signatures of Life on Mars

03/17/15 Was there ever life on Mars? How do scientists search for and analyze possible clues? Roger Summons

The Formation of Stars and Planets

09/15/15 How stars and their planetary systems form, and what the New Horizons mission to Pluto will reveal about the "fossil record" of our own solar system. Scott J. Kenyon

Cell Architecture: Self-Organization and Scaling

10/08/19 A cell's size and the proportions of its components are strictly determined, but where do the rules come from? Scientists are still trying to figure that out. Jané Kondev

The Jurassic Genome

12/09/09 Genetic material in ancient fossils yields an amazing profile of extinct organisms. Chris Organ

Plankton: The Humble Base of the Ocean Ecosystem

02/14/17 Ancient diatom fossils provide clues to the adaptability of these vital organisms in the deep past, and can help predict plankton survival in the present climate change. Christopher Bowler

Earthquakes and Tsunamis

04/12/16 How ocean earthquakes generate tsunamis --and where tsunamis can occur. John Ebel

How Environmental Pollutants Impair Brain Development

04/08/14 A world authority on how environmental toxins affect brain development brings the evidence to the general public. Philippe Grandjean

Nanotechnology in Medicine

04/20/17 A tour of some innovative medical nano-devices at the Tufts University Nano Lab. Sameer Sonkusale

Power Plants and the Freshwater Crisis

06/25/13 The cooling systems of power plants use an enormous percentage of our diminishing freshwater supply. What's the solution? John Rogers

Replacing Plastic: The Merits of Shrilk

02/04/14 Materials scientist Javier Fernandez discusses the "plastisphere" crisis and how it motivated the development of biodegradable "shrilk."

Today's Featured Contributors

Featured Author

Aaron Bernstein, M.D.

The most significant collection of writings on biodiversity and health today

Featured Guest

Elliott Negin

A prominent Union of Concerned Scientists writer who is a very reliable source of information about science-related issues