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Provocations #113: Depleting the ozone layer
LAS retreat ski trip ranch
Provocations #20: New findings about the Greenshouse Effect
Provocations #293: Solar activity approaches a maximum
Provocations #173: The record drought of 1986 in Eastern U.S.
Provocations #7: Harvest of sand
Provocations #33: Agriculture in the People's Republic of China
Provocations #152: Carl-Goran Heden
Provocations #109: Future boon from food and fiber of the past
Provocations #54: Secretary Shultz beats on the scientists
Provocations #191: Pliny's account of the fireball of 76 BC
Provocations #223: Robert FitzRoy, weather forecaster, tragic figure
Provocations #150: Private property in space
Provocations #124: Harambee - pull together
Provocations #77: The rings of Saturn
LAS retreat ski trip ranch
Provocations #132: A galactic embargo against terrestrials
Provocations #218: Otto Struve: scientist and humanist
Provocations #190: His laboratory was a sensational mess
Provocations #220: Sunspots are on the rise

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