A new exoplanet model screens rocky worlds by their ability to retain atmospheres over geologic timescales, helping narrow the search for potentially habitable planets beyond Earth.

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The National Postal Museum's website offers a variety of online activities for kids of all ages, including how to make your own time capsule!

The conflict in Iran and the recent shuttering of Spirit Airlines may increase flight costs this year. Airfare can be one of the most expensive parts of traveling. Apps make it easy to track trends in ...