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Provocations #210: Russia revisited
Provocations #69: An international research station in space
Provocations #159: Younger people in control of USSR Academy
Provocations #275: Strategies for a better future in a warmer world
Provocations #85: Why is the night sky dark?
Climax Observatory
Provocations #219: Authoritative critics of Soviet science
Provocations #169: A bold new space initiative
Provocations #176: Periodic mass extinctions of species
Provocations #78: Life at the deep ocean hot vents
Provocations #0
Provocations #117: Pedro Nunez and the observation of twilight
Provocations #25: Space measurements and the Greenhouse Effect
Provocations #107: Gravitational lenses
Provocations #283: Threats to the health of the biosphere
Provocations #209: Making weapons, talking peace
Provocations #245: Trees and the greenhouse warming
Provocations #271: Chaos and the greenhouse warming
Provocations #42: Changes in the Earth's rotation rate
Provocations #185: Command? Check VOLCANOES.ETC

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