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PHYEPS30 Lecture 17 (Second Part) Fourth Turning duration 1 hour 4 minutes PHYEPS30 Lecture 17 (Second Part) Fourth Turning PHYEPS30 Lecture 17 (Second Part) Fourth Turning	PHYEPS30 Lecture 17 (Second Part) Fourth Turning block hash bitcoin crisis transactions network things chain cycles transaction history point key war ledger blocks america fact values bitcoins From John Rundle 0 likes 13 plays 0
PHYEPS30 Lecture 17 (First Part) duration 1 hour 9 minutes PHYEPS30 Lecture 17 (First Part) PHYEPS30 Lecture 17 (First Part)	PHYEPS30 Lecture 17 (First Part) money bitcoin block bank gold network government transactions banks bitcoins paper lot blockchain stock ledger cryptocurrencies chain dollar coin problem From John Rundle 0 likes 13 plays 0