New findings suggest Mercury is contracting and experiences ongoing “mercuryquakes.”
It’s small, it’s hot, and it’s shrinking. Surprising new NASA-funded research suggests that Mercury is contracting even today, joining Earth as a tectonically active planet. Image via NASA/JHUAPL/Carnegie Institution of Washington/USGS/Arizona State University
This short video puts modern extinctions in context by comparing them with Earth’s 5 previous mass extinctions.
A waning crescent moon is sometimes called an old moon. It’s seen in the east before dawn.
Greg Diesel-Walck captured the waning moon on August 29, too. He wrote: "This morning's moon at sunrise in Moyock NC. Very difficult to capture the fading moon in the brilliance of color but this is not a filtered image right off the camera."
Lamnid sharks and tuna have similar physical traits that make them top ocean predators. But, a new study says, they took very different evolutionary paths.
Great white shark and bluefin tuna, at Monterey Bay Aquarium. Courtesy of Niall Kennedy via Flickr.com
Gamma Cephei (aka Errai) is a binary star system with at least one planet. It’ll someday be a Pole Star for Earth.
Image via Tim Jones/McDonald Observatory.
Water plumes erupting on Jupiter’s moon Europa might make it easier to investigate whether life exists in the warm ocean believed to be deep beneath its icy surface.
Image via NASA
Mass and energy are interchangeable.
Why does time flow inexorably toward the future? A Berkeley physicist proposes that time is expanding because space is expanding.
New Hubble image shows the demise of a sunlike star. Our own sun will also burn out and shroud itself with stellar debris, but not for another 5 billion years.
Image via NASA, ESA, and K. Noll (STScI)