The Core of the Moon

05/09/12 Did the ancient moon have a magnetic field like Earth's? And why do scientists need to know? Benjamin Weiss

Gamma Ray Bursts

01/26/16 An explanation of the most spectacular explosions in the universe, and their possible impact on life. Raul Jimenez

Leaving It Up to Chance: How Cells Make Decisions

03/18/14 Cells make decisions that turn out to be random. Jané Kondev explains the implications of that surprising discovery.

Microbial Ecosystems: The Foundation of Life on Earth

06/01/23 Although all life depends on microbial ecosystems, there are many unknowns about the mechanisms by which these ecosystems develop and evolve in diverse environments. Otto Cordero

Saving the Himalayas

12/22/15 Can the great Himalaya ecosystem adapt to the dual assault of rapid development and climate change? Maharaj Pandit

Human Earth

12/09/21 A distinguished geologist compares the human impact on our planet with the impacts of natural catastrophes over billions of years. Based on his book, A Brief History of Earth, this discussion is a sequel to an earlier conversation. Andrew Knoll

How Effective Are Vitamin D Supplements?

04/23/24 Promoted for years as a means to strengthen bones and lower risk of multiple diseases, improved studies by JoAnn Manson and others revealed that Vitamin D supplements were not very effective at all. Natural sources, including sunshine, are much better. It’s important to understand why. JoAnn Manson

Probing the Health Molecules of Plants: The Weng Lab at Whitehead Institute

02/10/19 A visit to the Weng Lab at Whitehead Institute to learn how researchers exploit the mechanisms and molecules of plants contributing to medical innovations. Jing-Ke Weng

Innovations in Clean Water Technology

12/20/11 Desalination offers a solution to the water shortage problem... John Lienhard V

Designing Sustainable Urban Development

11/25/19 How the world-class Sustainable Design Lab at MIT combines architecture, engineering, physics --and creative genius-- to design the optimal urban environment. Christoph Reinhart

Today's Featured Contributors

Featured Author

Paul Steinhardt, Ph.D.

An excellent resource on cosmology for the general reader, co-authored by one of the greatest theoretical physicists of our time

Featured Guest

Daniel Nocera

A distinguished chemist and innovator, known especially for his energy innovation, the bionic leaf.