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The M87 black hole image showed the best way to measure black hole masses 0
- From Around the Web, Space
- April 23, 2019
Its diameter suggests the black hole is 6.5 billion times the mass of the sun

By David Aragorn
Will Trump’s Space Force lead to a cosmic war?0
- From Around the Web, Science & Technology, Space
- April 23, 2019
President Donald Trump recently called for a “Space Force” to defend the United States’ extraterrestrial operations. Russia, China, and India have also beefed up their military capabilities in space. Are we headed for a cosmic conflict?

By David Aragorn
Astronomers Find Second Galaxy with No Dark Matter 0
- From Around the Web, Space
- April 23, 2019
In 2018, a team of astronomers from the United States and Canada discovered that an ultra-diffuse galaxy called NGC 1052-DF2 (DF2 for short) contains virtually no dark matter. The galaxy is roughly the size of our Milky Way Galaxy, but hosts only 1/200 the number of stars. It lies in the constellation of Cetus, about 65 million light-years away, and is a member of the NGC 1052 group of galaxies. Now, the team reports the discovery of a second galaxy in this class, residing in the same group.

By David Aragorn
Ancient sculptors made magnetic figures from rocks struck by lightning 0
- Ancient Archeology, From Around the Web
- April 22, 2019
Guatemalan ‘potbelly’ sculptures suggest people knew about magnetism more than 2,000 years ago

By David Aragorn
This Greek philosopher had the right idea, just too few elements 0
- Ancient Archeology, From Around the Web, Science & Technology
- April 20, 2019
Empedocles didn’t make a periodic table, but identified basic concepts of matter and force

By David Aragorn
Scientists say fossils are ‘missing link’ in human history 0
- Ancient Archeology, From Around the Web
- April 20, 2019
The fossils of Australopithecus sediba have fueled scientific debate since they were found at the Malapa Fossil Site in South Africa 10 years ago.

By David Aragorn
Africa’s largest mammalian carnivore had canines ‘the size of bananas’0
- Ancient Archeology, From Around the Web
- April 20, 2019
When paleontologists dug up the bones of Africa’s largest carnivore in the early 1980s, they had no idea what they had found.

By David Aragorn
We Could Soon Watch a Black Hole in Action, Gobbling Up Matter in Real Time 0
- From Around the Web, Space
- April 20, 2019
Last week, the Event Horizon Telescope (EHT) released the first-ever image of a black hole’s shadow cast against the hot gas of its accretion disk. That image, of the black hole at the center of galaxy Messier 87 (M87), was front page news all over the world. Soon, the EHT will produce the first movie of that hot gas whirling chaotically around the shadow, said project leaders who spoke Sunday (April 14) here at the April meeting of the American Physical Society.

By David Aragorn
Yellowstone, NASA, and the New World Order 0
- Earth Mysteries, From Around the Web, Science & Technology
- April 19, 2019
Scientists recently rejected the claim that the Yellowstone caldera is overdue for its regular 600,000-year supereruption. However, one week later, researchers announced their surprise at discovering new thermal areas developing.

By David Aragorn
More than a million tiny earthquakes revealed in Southern California 0
- Earth Mysteries, From Around the Web, Science & Technology
- April 19, 2019
Abundant data on little quakes can help scientists learn more about what triggers the big ones

By David Aragorn

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