http://www.astronomycast.com/planetary-science/ep-141-volcanoes-hot-and-cold/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+astronomycast+%28Astronomy+Cast%29 (Volcanoes, Hot and Cold)
http://grokscience.wordpress.com/ (Quantum Story)
http://webcast.berkeley.edu/media/common/rss/Astronomy_7B__001_Spring_2010_Audio__webcast.rss (Lecture 26)
http://podcasting.jhu.edu/makefeeds.php?courseid=67754 (General Biology I)
http://www.scientificamerican.com/podcast/sciam_podcast_r_psych.xml (Brain Imaging Studies...)
Podcasts are digital media files that are can be downloaded through the internet. There are many advantages and disadvantages of all of these podcasts. All of them provide education to the listener. The person speaking on the podcast can be anyone ranging from a child to a professor. All of these podcasts are from educational places, so the people speaking on them all should have degrees.
Another advantage of these podcasts is that they can be use in substitute to an onsight classroom. The listener can learn the information as if they were in a classroom, except they aren't. The podcasts can be retrieved from any place that has internet access. The podcasts also have an advantage over regular lectures because you can pause and rewind them. This is beneficial in case a listener is writing notes.
There is one disadvantage these 5 podcasts have in common. In general, some podcasts have video. In the cases of these podcasts, there is no video. Since some people are visual learners, these podcasts may not be useful to them. If they had video with the audio, then I would not see any disadvantage.
