Randall Carlson does a nice job explaining subjects which would otherwise be incredibly dense. I especially enjoyed this entire series: Cosmography 101. In this series he points out that ancient humans around the time of the last ice age appear to have been cosmographists. With this in mind he explores various scenarios of what might have occurred based on geological evidence. Once you finish hearing what Carlson presents I am certain you will know more than you wanted about the Younger Dryas. You will also encounter many comprehensive descriptions of comets and asteroids. Unfortunately for Carlson, his ideas on the events of the last ice age are an anathema to some of the worlds popular ideologies: those who hold a religious based on the Bible’s account of a supernatural guiding force and those who hold a scientific view based on gradualism. If you maintain a religious understanding, then the proof that these historical events occurred through purely physical interactions between material things following mathematical laws, then you will most likely close your attention to the evidence immediately. The same refusal will occur by those scientifically oriented who think their already correct view of this time era is true and scientifically valid. Dare to be challenged?
Life’s Rocky Start gives a decent educational account of the importance of minerals to both the formation (assuming life originated on Earth) and the progressive development of life. It is one of the few documentaries I have seen that properly shines light on the importance of meteorites to the understanding of planetary formation. The documentary starts by visiting Marrakesh, Morocco to show how meteorites are obtained in the infamous Northwest Africa region. I only wished it developed more on this meteorite theme.
Rocks from Space: Meteorites and Meteorite Hunters by O. Richard Norton provides an easy to read and informative glance at the conceptual and scientific history of meteorites. It also explains the basic ideas regarding the classification of meteorites.
It is surprising to me that man’s awareness of meteorites as being “rocks from space” is relatively recent (early 1900’s). There have been numerous “witnessed falls” throughout written history; however, the association of these heavenly phenomena (meteors) with solid iron and rocky objects was almost non-existent. Instead they were commonly regarded as apparitions much like rainbows. This explains the existence of several English words which are all related to these objects, their atmospheric interaction and their final discovery as a rock like object — i.e., a meteoroid becomes a meteor which becomes a meteorite. The realization that meteors are formed by space rocks began the “meteorite rush.”
The search for specimens was initially done by a small group of people, and in some cases a single man, Harvey Nininger; Nininger was as American meteorite pioneer in the early/middle part of the 20th century. He raised awareness and spent his entire life devoted to meteorite hunting and study. After Nininger, Robert Haag became the most widely known meteorite hunter and collector in America. Now scientific teams and other meteorite hunters all over the world are providing vast numbers of finds in the Antarctic and in various deserts spanning the globe.