Comments (3)

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A life long Learner
reply 0

Great conversation

The Doomsday Glacier - Professor Richard Alley Part 2
1 years ago reply 0
A life long Learner
reply 0

great topic

Only the Strong Survive - Sand
1 years ago reply 0
westislander
reply 0

Excellent balance of technical technical and practical information. interesting topics.

1 years ago reply 0