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(1 - 19 of 19)
Provocations #8: The death of the Earth
Provocations #29: The aurora and the origins of the Earth
Provocations #61: Sea level rises with the warmer Earth
Provocations #42: Changes in the Earth's rotation rate
Provocations #189: The largest ice sheet on Earth
Provocations #148: Tom Gold and deep Earth methane
Provocations #196: Earth-like climates on other planets?
Provocations #249: Varves reveal ancient Earth and Moon parameters
Provocations #25: Space measurements and the Greenhouse Effect
Provocations #288: When is it time to cry wolf?
Provocations #66: Daisyworld--a new look at our planet
Provocations #293: Solar activity approaches a maximum
Provocations #166: Mars is the place
Provocations #84: Life from space
Provocations #283: Threats to the health of the biosphere
Provocations #257: Nuclear fusion in a test tube
Provocations #167: Research for our global future
Provocations #108: Disagreements over cooperation in fusion research
Provocations #194: Scientists and the arms race