A polar vortex dipping down from Siberia will bring a cold front with frigid temperatures to nearly 300 million Americans.

Earth’s magnetic north is not static. Like an anchorless buoy pushed by ocean waves, the magnetic field is constantly on the move as liquid iron sloshes around in the planet’s outer core.

A once-in-a-lifetime comet is approaching the sun — and it will be visible for the first time in 160,000 years. The comet ...

Donald Trump’s defenders have little choice but to cast his trolling as a clever geopolitical stratagem.

India observes Sankranti as a mid-winter harvest festival. Celebrated with kites in Gujarat, prayers in the north and Pongal ...

Do you want a future in which Canada defects to the EU, Russia rules the Arctic and China runs Latin America? That’s the default outcome of non-action.

Here's a round-up of space missions and cosmic events just around the bend in 2025. Several companies will attempt moon ...

With modern GPS, we often don’t think too hard about how to navigate, but GPS does not work very well on the open sea. That ...

Trump suggests renaming the Gulf of Mexico to the Gulf of America. So, can he do that? Here's what goes into a name.

The Quadrantids meteor shower will have its most vibrant display tonight into early Friday morning, with meteors emanating from the northeast in the direction of the Big Dipper. Partly to mostly ...