Hundreds of small earthquakes that shook Greece's tourist hotspot of Santorini this week have revived concerns about the ...

The gigantic Yellowstone Grand Canyon, lined with volcanic rock. With all the effects of hydrothermal activity, river erosion ...

The company plans to send its Falcon 9 rocket on a mission to deliver 21 new Starlink satellites into low-earth orbit. The satellites are used to expand Starlink’s global high-speed internet network.

NASA astronaut Bruce McCandless became the first person to go on a spacewalk without a tether. McCandless was wearing a type of jetpack known as the Manned Manoeuvring Unit, or MMU. The MMU fit over a ...