Brazil's Lula pledges to finish paving road that experts say could worsen Amazon deforestation
Spacewalking is the new domain of the rich as billionaire attempts first private spacewalk
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New Orleans braces for Hurricane Francine; evacuations ordered
Wildfires hit California and Nevada, prompting evacuations and power outages
SpaceX’s Polaris Dawn mission just made history. But the riskiest part is still to come
Polaris Dawn crew flies higher than 1966 Gemini 11 orbital record
