Astrobiologist David Grinspoon wrote a book looking at the past 10,000 years and other Earth-like planets, such as Venus and Mars, to discuss climate change on Earth. Now, he's giving a lecture about it....

Since the beginning of 2016, most of the U.S. has been tense because of the presidential election. With the end of that tumultuous event comes something soothing: A supermoon. The supermoon will happen...