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(CNN) — More than a dozen aid workers have been killed or gone missing in Gaza over the past few days, several groups say, as ...

The NASA Curiosity rover has detected the largest organic molecules found to date on Mars, opening a window into the red planet’s past. The newly detected compounds suggest complex organic chemistry ...

Guyana’s destiny changed in 2015. US fossil fuel giant Exxon discovered nearly 11 billion barrels of oil in the deep water off the coast of this tiny, rainforested country. It was one of the most ...