The concept of the “great filter” to explain why so far we seem to be alone in the universe is based on erroneous assumptions, according to a new model that describes how life on Earth evolved in step with changing geobiological conditions rather than through a series of improbable events. “We’re arguing that intelligent life … Read more
View larger. | A new theory proposes that humanity – and other analogous forms of intelligent life in the universe – might not be as extraordinary or improbable as previously thought. Instead, we might represent the probable outcome of biological and planetary evolution. The new theory challenges the decades-old hard steps” theory of human evolution. … Read more
Life as we know it needs water, but life as we don’t know it may run on concentrated sulfuric acid. The chemistry of life as we know it wouldn’t work in a place like the huge Saturn moon Titan, where it’s so cold that ice behaves more like rock, or in the acidic clouds of … Read more
A new 3D computer model of the planet through time has helped answer a contentious question: How did the Earth’s ice caps form? “The study looked at the Earth’s long-term stable climate,” explains the University of Adelaide’s Andrew Merdith, lead author on the new study in Science Advances. “Over tens to hundreds of millions of … Read more
View larger. | Artist’s illustration of Cassini spacecraft flying through the water vapor plumes of Enceladus. A new study from researchers in the UK has found that Enceladus’ subsurface ocean might have layers that make it difficult to find traces of life on Enceladus. Image via NASA/ JPL-Caltech/ Space Science Institute. Saturn’s moon Enceladus has … Read more
Hypervelocity stars have been seen before but NASA scientists have just identified a potential record-breaking exoplanet system. They found a hypervelocity star that has a super-Neptune exoplanet in orbit around it. This discovery could reshape our understanding of planetary and orbital mechanics. Understanding more about these fascinating high velocity stars challenges current models of stellar … Read more
The hulk of metal moved silently through space, high above the blue Earth. Power no longer coursed through its wires, its instruments were dead to the outside universe, and its communications antenna was silent. To all intents and purposes it was deceased, and almost everyone back home had given up on it. Almost everyone. Despite … Read more
How would detecting methane help astronomers identify if exoplanets, or even exomoons, have life as we know it, or even as we don’t know it? This is what a recent study published in The Astronomical Journal hopes to address as a team of researchers led by the NASA Goddard Space Flight Center investigated how a … Read more
Technicians carrying the precious sample of asteroid Bennu in 2023. The sample was headed for a newly constructed clean room at Johnson Space Center in Houston. Image via NASA. Bennu is a carbon-rich asteroid that passes semi-close to Earth about every six years. Scientists say it might have originated from a larger body farther out … Read more
Do we have a planetary bias when it comes to understanding where life can perpetuate? It’s only natural that we do. After all, we’re on one. However, planets may not be necessary for life, and a pair of scientists from Scotland and the USA are inviting us to reconsider the notion. We focus on planets … Read more