Humans Arrived in the Final Minutes of Earth’s “Year” — And the Future Holds Astonishing Events ...

Searching for technosignatures—signs of technology on a planet that we can see from afar—remains a difficult task. There are so many different factors to consider, and we only have the technological ...

US Secretary of State John Kerry Thursday urged nations to set ambitious goals to curb greenhouse gases, warning climate change deniers that gambling with the Earth's future was a risky business as ...