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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.
Mass and energy are interchangeable.
We thought we might get through this summer without the dumb hoax about Mars as big as a full moon rearing its head. But, no.
No one knew whether Mount Chamberlin or Mount Isto was taller. Now an aerial study – and a ski mountaineer – declare a winner.
The next eclipse is an annular solar eclipse on September 1, 2016.
Every calendar year has at least 4, but 5, 6 or even 7 eclipses are also possible. Why don’t we see them all?
American astronomer Asaph Hall discovered Phobos, one of the two Martian moons, on this date in 1877. Did he imagine how well we’d see Mars’ moons today?
It’s the insect star of The Silence of the Lambs.
Circumzenithal arcs have been described as an “upside down rainbow” or “a grin in the sky.” They’re wonderful! See photos here.
You call them starfish? They’re brilliant by any name.
Moon, Venus, Mars on December 3
See it! Moon sweeps past Venus