planck
There Might Be a Hidden 'Crisis' in What We Know About the Universe
Scientists think the universe is flat, but new observations suggest that we might actually be living in a gigantic sphere. Whoa.
The Definition of a Kilogram Just Changed Worldwide
The kilogram is the last unit of measurement to be untethered from an artificial object.
Inside the High-Tech Lab Where Scientists Are Redefining the Kilogram
The watt balance will tell us what a kilogram is.
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The Rise and Fall of a Would-Be Gravitational Wave Observation
The deep sky is a more complex place than BICEP cosmologists had assumed.
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