Yes, ancient civilizations on Mars sounds crazy. And yet…
Ars Technica — 6:50 pm ET (2250 GMT)

Astronomers now think they know what that ‘weird’ radio signal from space was
GeekWire — 6:50 pm ET (2250 GMT)

NanoRacks airlock moving toward 2019 installation on the ISS
SpaceFlight Insider — 6:49 pm ET (2249 GMT)

'Sprained Ankle': Opportunity Rover Sends Back New Panorama from Above Ancient Gully
AmericaSpace — 6:47 pm ET (2247 GMT)

Flashes of light on the dark matter
SISSA — 6:43 pm ET (2243 GMT)

Superluminous supernova marks the death of a star at cosmic high noon
Royal Astronomical Society — 6:43 pm ET (2243 GMT)

Earth might once have resembled a hot, steamy doughnut
Science News — 6:42 pm ET (2242 GMT)

The Next Step In The Search For Aliens Is A Huge Telescope And A Ton Of Math
FiveThirtyEight — 6:39 pm ET (2239 GMT)

Meet the scientist who turns data into music—and listen to the sound of a neutron star
Science — 6:39 pm ET (2239 GMT)

On Atlantis’ anniversary, USA’s future space fleet closing in on maiden flights
NasaSpaceFlight.com — 6:36 pm ET (2236 GMT)

Meet the Woman Trying to Prepare Your Town for the Total Eclipse
Wired News — 6:34 pm ET (2234 GMT)

Bag With Moon Dust in It Fetches $1.8 Million From a Mystery Buyer
New York Times — 6:32 pm ET (2232 GMT)

"Great American Eclipse": Excitement builds for total solar eclipse Aug. 21
CBS — 6:32 pm ET (2232 GMT)

DLR to fly experiments on Blue Origin’s New Shepard
Space News — 6:30 pm ET (2230 GMT)

NASA and companies express growing confidence in commercial crew schedules
Space News — 6:30 pm ET (2230 GMT)

Germany’s long-awaited Heinrich Hertz satellite now expected to launch in 2021
Space News — 6:29 pm ET (2229 GMT)

'Valerian' Delivers an Extraterrestrial Spectacle
SPACE.com — 6:29 pm ET (2229 GMT)

Disney's New Space-Themed Restaurant Will Let You Dine Like an Astronaut
SPACE.com — 6:28 pm ET (2228 GMT)

Notes from Mars 160: The Arctic Journey Begins
SPACE.com — 6:28 pm ET (2228 GMT)

Jeff Bezos' Vision: 'A Trillion Humans in the Solar System'
SPACE.com — 6:28 pm ET (2228 GMT)

In 'Valerian,' International Space Station Evolves into Interstellar Metropolis
SPACE.com — 6:27 pm ET (2227 GMT)

Solar Eclipse Day Craziness Could Resemble the Zombie Apocalypse — Are You Ready?
SPACE.com — 6:27 pm ET (2227 GMT)

Old NASA Computers, Tapes Found in Dead Man's Basement
SPACE.com — 6:26 pm ET (2226 GMT)

Target's Space-Based Cotton Challenge Aims for Sustainable Farming on Earth
SPACE.com — 6:25 pm ET (2225 GMT)

Speedy Mars Moon Zips Around Red Planet in Amazing NASA Video
SPACE.com — 6:25 pm ET (2225 GMT)