Dark Energy and the Cosmic Expansion

12/14/21 The Dark Energy Spectroscopic Instrument (DESI) is the most advanced probe of the relationship between dark energy and the expansion of the universe. A unique project in astronomy. Arjun Dey

Astrophysics Knowns and Unknowns

12/20/16 A guide to fundamentals of astrophyics at a time of many exciting --and sometimes puzzling-- discoveries. Priyamvada Natarajan

How DNA is Folded in Cells and Why it Matters

10/14/14 How DNA is folded in the cell may shed light on cancer and other diseases. Jané Kondev

The Mystery of Animal Migration

09/17/24 How migratory creatures navigate so accurately to their seasonal destinations, sometimes thousands of miles away, is still often a mystery. What do scientists know, and what are they still trying to discover? Charles Walcott

The Role of the Ocean in the Global Carbon Cycle

01/22/13 The complex relationship between marine life and the chemistry and circulation of oceans. Mick Follows

The Politics of Food's Environmental Footprint

04/17/12 Calculating the impact of large-scale food production on the environment... Susanne Freidberg

The Struggle to Ban Pesticides That Disrupt Brain Development

07/05/22 Scientists struggled for decades to get an EPA ban on Chlorpyrifos, a widely used pesticide known to impair brain development. As autism, ADHD and other developmental conditions increased, vested interests blocked efforts to regulate Chlorpyrifos and other agricultural toxins. Philip Landrigan

The Opioid Crisis: Origin and Implications

05/30/23 The Centers for Disease Control and Prevention (CDC) has aptly described the opioid crisis as the “worst drug overdose epidemic in [US] history.” How did that happen? Andrew Kolodny, M.D.

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

H. William Detrich, Ph.D.

Two textbooks by an international expert on Arctic biology and genetics

Featured Guest

Roger Summons, Ph.D.

A major contributor to the identification of biomarkers in ancient Earth rocks and oils, as well as extraterrestrial biogeochemical fossils