Scientists have spent decades debating whether asteroids and comets hit the Earth at regular intervals. At the same time, a few studies have found evidence that the large extinction events on Earth – such as the one that ...
Space Exploration
Jun 22, 2017
12
73
Ice cores and ancient sediments can be gleaned for clues to weather and climate in the past. But astronomical phenomena—such as solar flares or auroras—at best leave only faint environmental traces lacking in specificity. ...
Space Exploration
Apr 5, 2017
0
74
In 1908 it was Tunguska event, a meteorite exploded in mid-air, flattening 770 square miles of forest. 39 years later in 1947, 70 tons of iron meteorites pummeled the Sikhote-Alin Mountains, leaving more than 30 craters. ...
Space Exploration
Dec 9, 2016
7
14
The new movie "Interstellar" explores a longstanding fascination, but UA astrophysicists are using cutting-edge technology to go one better. They're working on how to take pictures of the black hole at the center of the galaxy.
Astronomy
Nov 6, 2014
6
0
The movement of the Sun in the skies of Petra determined the way in which the monuments of this and other Natabean cities were erected. This is according to a statistical analysis on the spatial position of their palaces, ...
Archaeology
Mar 6, 2014
0
0
(Phys.org)—With its 2160 litres of liquid helium about to run out, the Herschel Space Observatory will, by the end of March, become just another piece of space junk.
Astronomy
Jan 2, 2013
0
0
Australia was gearing up Tuesday for the transit of Venus, an event with historical significance as a previous occurrence in 1769 played a key part in the "discovery" of the southern continent.
Space Exploration
Jun 5, 2012
0
0
(AP) -- After an entire century that included two high-profile government investigations and countless books and movies, we're still debating what really caused the Titanic to hit an iceberg and sink on that crystal-clear ...
Other
Apr 11, 2012
9
0
The 34,000-acre Chaco Culture National Historical Park is home to many ancient wonders including the remains of a civilization that thrived over 1,000 years ago. The park, which has been protecting its archaeological riches ...
Space Exploration
Sep 2, 2013
0
0
The 1969 "Woodstock" song by Joni Mitchell, it turns out, was onto something: "We are stardust / billion-year-old carbon."
Other
Jan 8, 2013
0
0
