A key unknown in lunar science is to what extent the Moon is a melted, radially layered planet like Earth or a primordial unmelted relic of the early solar system, like many asteroids. A new era of lunar exploration is underway, offering major new insights into this decades-old question.
In this podcast from the April 8 "Frontiers" lecture series, planetary scientist Ben Weiss of the Massachusetts Institute of Technology reviews current understanding of the lunar interior and shares new results from spacecraft observations and studies of Apollo samples.
Science fiction portrays our Milky Way Galaxy as filled with habitable planets populated by advanced civilizations. Back in our real universe, not a microbe has been found by scientists observing exoplanets—Earth-like planets orbiting other stars.
In this podcast, join Geoff Marcy, Professor of Astronomy at University of California, Berkeley, as he discusses the Earth-like worlds discovered by NASA’s new space-born Kepler telescope.
For one year, biologist David Haskell watched the same, one-square-meter patch of old growth forest in the mountains of Tennessee. In this podcast, Dr. Haskell shares some of the stories and scientific insights from his book, “The Forest Unseen,” which chronicles his experience of closely observing one small ecosystem.
As food production goes global, there are a number of hidden forces that shape what we eat. In this podcast, join a group of researchers and food policy experts as they discuss the ethical, biotechnology and patent issues surrounding the food that may or may not end up on the shelves of your local supermarket.