Space & PhysicsAugust 1, 2018
The Utter Failure of Fictional Time Travel
An answer to why we’ve not been visited from the future?
Stories by Caleb A. Scharf
Caleb A. Scharf is a researcher and writer. He is the senior scientist for astrobiology at NASA's Ames Research Center in Silicon Valley.
Space & PhysicsJuly 20, 2018
Moon Talk
What were the Apollo 11 astronauts and controllers really saying to each other?
Space & PhysicsJuly 16, 2018
350 Posts: From Blue Dots to Black Holes
The Life, Unbounded column reaches a milestone and reflects on seven years of astrobiology, astrophysics and wonderfully crazy stuff
Space & PhysicsJuly 12, 2018
The Worst Universe
There's a lot to be learned by exploring pessimistic scientific scenarios
Space & PhysicsJuly 10, 2018
Dust Bowl Mars
As our robotic rovers experience a global storm on Mars it’s an opportunity to reflect on billions of dry, dusty years
Space & PhysicsJune 29, 2018
Astrobiology in Context: A Modern Timeline
A graphical review of major scientific milestones over the past four decades helps put the search for life into perspective
Space & PhysicsJune 27, 2018
The Information of Intelligence
Defining intelligence anywhere in the universe is tricky, but there’s one thing that might provide a clue
Space & PhysicsJune 26, 2018
Balancing Rocks and Philae's Wave
Stunning images from the final archive of the Rosetta comet mission
ComputingJune 13, 2018
The Erosion of Reality
The most immediate AI threat may be the distortion of truth; something we, and other species, have been doing for a long time
Space & PhysicsMay 31, 2018
A Sentinel's View of a Habitable Planet
There are many ways to map out a world
EvolutionMay 30, 2018
The Human Strain
We used to live on a planet with other thinking, two-legged beings, and that could inform us about intelligence in the universe
Space & PhysicsMay 29, 2018
Astrobiology Roundup: Stars in a Multiverse, Drills on Mars and More
The northern summer brings some intriguing research and exciting developments
Space & PhysicsMay 16, 2018
Why SpaceX's "Block 5" Is a Big Deal
Psst! Want a used rocket? I've got a lovely one for you, ready to fly today
Space & PhysicsApril 29, 2018
Sniffing and Peeking at Mars
The ExoMars Trace Gas Orbiter gets into position and takes some new pictures
Space & PhysicsApril 25, 2018
This Island Earth
One planet, modified by life, racing into the future. Our species should gear up
Space & PhysicsApril 15, 2018
The Moon in 4K
Using updated survey data a stunning ultrahigh-definition tour of the lunar surface brings our satellite to life
ComputingApril 7, 2018
Do Quantum Machines Roam the Universe?
An upcoming public discussion triggers some thoughts on exotechnology
Space & PhysicsMarch 31, 2018
Interplanetary CubeSats Are Go!
NASA’s latest Mars probe has a couple of very special hitchhikers
Space & PhysicsMarch 27, 2018
The Distant Shores of Mars
A complex interplay of gravity, volcanoes and planetary wobble could pin down the age of oceans on Mars
Space & PhysicsMarch 19, 2018
A Cold Fire off the Shoulder of Orion
A spectacular ALMA image reveals the threads of material that help build new stars
Space & PhysicsMarch 7, 2018
The Technosignature Challenge
Taking SETI more seriously means thinking expansively, but how do we evaluate the options?
Space & PhysicsFebruary 21, 2018
SETI, the Next Generation?
Time to bring the search for extraterrestrial technosignatures all the way in from the cold
Space & PhysicsJanuary 30, 2018
Exoplanetary Science, Build 2.0
The time is ripe for getting really serious about other worlds, and other life
OpinionJanuary 25, 2018
Twinkle, Twinkle, Satellite Vermin
Is a deliberately shining satellite in the sky a cute idea or a menace?