If you’re concerned about your personal finances, or energy security or climate change, and you want to cut down on your use of fossil fuels, Sustainable Energy—Without the Hot Air explains which actions make a significant difference and which make very little.
Preserved tracks suggest non-avian dinosaurs used their wings to run
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Not all winged dinosaurs were necessarily capable of full flight, but this
anatomical feature may have enabled them to travel further by flapping or
gliding
2 hours ago
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