Explaining and Measuring the Expanding Universe

08/28/20 The universe is expanding at an incredible rate, and dark energy is thought to be the cause. Astronomers observe and measure this mystery with very sophisticated equipment. Paul Martini

Science Speculations: Time Travel

03/15/18 How realistic is the time-travel concept and how would time machines work? David Toomey

Infant Fossil Teeth: Clues to Ancient Human Development

11/13/13 Ancient infant teeth reveal the importance of weaning patterns in human evolution. Tanya Smith

The Evolution of Photosynthesis

10/19/10 How photosynthesis --and life-- emerged in Earth's ancient chemical environment. Tanja Bosak and Alexander Petroff

Deep-Sea Volcanoes

04/26/16 Scientists are now able to study in detail the dynamic volcanic activity of the deep ocean ridges. Here are some amazing discoveries. Daniel Fornari

The Real Key to Feeding the World

09/20/21 A distinguished scientist and author od "Growing a Revolution: Bringing Our Soil Back to Life" explains the destructiveness of industrialized agriculture and shows how to feed the world while restoring the soil and environment. David Montgomery

Viruses: Threats in a Tiny Package

11/06/14 Viral infections that were once obscure are potentially global threats in a highly linked world. New tools are being deployed to identify and block these diseases. John Connor

Medicating ADHD: Diagnosis and the Long-Term Effects of the Medications

03/20/13 The potential danger of long-term use of ADHD drugs. Robert Whitaker

Distinguishing Scientific Facts from Disinformation and Distortion

04/05/22 How can we distinguish scientific facts from disinformation? This Union of Concerned Scientists writer battles distortion on a regular basis. Elliott Negin

Solar Thermoelectric Alternative Energy

10/25/11 A nanotechnology innovation designed to significantly improve production of solar energy. Gang Chen

Today's Featured Contributors

Featured Author

David R. Montgomery, Ph.D.

A leading geologist who connects the relationship between rocks and life

Featured Guest

Tereasa Brainerd, PhD

An astrophysicist whose work focuses on dark matter halos, satellite galaxies and gravitational lensing