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Jeff Bezos' Blue Origin is auctioning off a seat on its first space tourism flight
SpaceX launches and lands Starship in first successful flight
Mysterious structures in Saudi Arabia thousands of years older than Stonehenge, pyramids
King Henry VIII's ship reveals racially diverse Tudor England
Climate pledges see world closing on Paris goal, researchers say
How long is the solar system's longest day? Venus has the answer
Biden admin’s first climate pollution rule takes aim at refrigerants
Latin America looks to space, despite limitations on ground
CVS, Walgreens have wasted more vaccine doses than most states combined
There's a reason why we bond with some dogs more than others
Covid vaccine safety system has gaps that may miss unexpected side effects, experts say
Changing global and political landscapes have made the kind of broad and bipartisan agreements reached in the 1970s seem impossible.