[Thylacine]

Here are another 3 natural history type podcasts to consider downloading:

http://www.rspb.org.uk/podcasts/naturesvoice.aspx

http://planetearth.nerc.ac.uk/multimedia/index.aspx

http://www.abc.net.au/rn/scienceshow/

And another one on plain history which is great

http://www.dancarlin.com/disp.php/hharchive