US and World News

Explosive neutron star collision may have created a rare, extreme star - CNET
NASA's Hubble Telescope sees a flash of light 10 times brighter than expected... what was it? Perhaps the birth of a magnetar.

Dress-rehearsal countdown sets stage for SpaceX Crew Dragon launch - CBS News
Four astronauts work through a dress-rehearsal countdown before Saturday's scheduled launch to the International Space Station.

Escape from Mars: How water fled the red planet -
Mars once had oceans but is now bone-dry, leaving many to wonder how the water was lost. University of Arizona researchers have discovered a surprisingly large amount of water in the upper atmosphere of Mars, where it is rapidly destroyed, explaining part of …

'Past a point of no return': Reducing greenhouse gas emissions to zero still won't stop global warming, study says - USA TODAY
Even if human-caused greenhouse gas emissions can be reduced to zero, global temperatures may continue to rise for centuries afterward.

SpaceX Crew-1 mission: Everything you need to know about the historic launch - CNET
A SpaceX Crew Dragon will carry humans from NASA and JAXA to space in the first operational mission from US shores since 2011.

Arecibo Observatory in Puerto Rico is at risk of collapsing - National Geographic
Arecibo Observatory, which has discovered planets, searched for alien life, and appeared in classic films, is in critical danger after two cables supporting the telescope failed.

A human cell atlas of fetal gene expression - Science Magazine
Understanding the trajectory of a developing human requires an understanding of how genes are regulated and expressed. Two papers now present a pooled approach using three levels of combinatorial indexing to examine the single-cell gene expression and chromat…

Your best bet for catching a breathtaking glimpse of the Leonid meteor shower this month - KSAT San Antonio
Have you heard of the Leonid meteor shower? It comes around every November, but the chances of seeing it this year are much higher than last year.

3-Million-Year-Old Fossil from New Zealand Rewrites Evolutionary History of True Seals | Paleontology -
An international team of paleontologists has described a new species of extinct monk seal that lived during the Pliocene epoch in New Zealand -- the first of its kind from the southern hemisphere.

The only photo of Neil Armstrong's moonwalk and the first 'space selfie' are up for sale - USA TODAY
The rare collection features images spanning from Project Mercury, NASA's first missions to bring mankind to space, to 1972's Apollo 17.

Hubble Catches a Cosmic Cascade - NASA
The galaxy UGCA 193, seen here by the NASA/ESA Hubble Space Telescope, is a galaxy in the constellation of Sextans (The Sextant).

Scientists and astronomers are carefully watching asteroid Apophis as it approaches Earth - SYFY WIRE
This year has been an extremely active year for news of asteroids and comets with NASA's OSIRIS-REX touching down on asteroid Bennu last month, and a veritable flurry of comets whizzing past our Big Blue Marble like F3 Neowise, F8 Swan, P1 Neowise, M3 Atlas, …

NASA's Curiosity Takes Selfie With 'Mary Anning' on the Red Planet - NASA Mars Exploration
The Mars rover has drilled three samples of rock in this clay-enriched region since arriving in July.

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