Artist's impression of a supermassive black hole surrounded by gas and dust in four different wavelengths of light. Visible ...

And for anyone worrying if a black hole could be tunneling through them right now, the authors assure readers that humans are much less brittle than a piece of rock, and the black hole would be ...

Papago Park features several hikes – perhaps the most distinctive is Hole in the Rock. Nestled in and among the red butte formations of the park, this short but spectacular hike (it is only 0.3 ...