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Jul 8, 2024 · Defining life has proven to be a difficult task, even though many of us can look at most things and tell if they’re alive or not. The most widely accepted scientific definition for life right now is this: “life is a self-sustaining chemical system capable of Darwinian evolution”. However, there are still problems with this definition.
Signs of Life is an astronomical detective story that propels visitors to uncover what it took to put life in the universe. Earth is the launchpad to Mars, the moons of Jupiter and Saturn, and planets beyond our Milky Way Galaxy in a search for answers to the mysteries that captivate our imagination.
Learn about the basic properties of life as well as ongoing debates about the definition of life.
Jun 20, 2023 · New technology and deeper understanding are moving us closer to detecting signs of life on another world.
Apr 27, 2021 · Potential signs of life, of course, might be detected among the planets in our own solar system – or, more speculatively, via signals from intelligent, technological lifeforms somewhere in the galaxy. But capturing signs of biological activity from exoplanets is a higher technological hurdle.
So far, the only life we know of is right here on planet Earth. But NASA is looking for signs of life in our solar system and on some of the the thousands of planets we've discovered beyond it, on exoplanets. We can probe alien atmospheres for biosignatures, which could indicate life below.
6 days ago · Defining life from the viewpoint of examining its characteristics reveals how much life on Earth has in common, and helps distinguish between living and non-living things, which is important for learning if life could be possible beyond Earth.
Jul 20, 2021 · NASA’s Mars 2020 Perseverance rover has begun its search for signs of ancient life on the Red Planet. Flexing its 7-foot (2-meter) mechanical arm, the rover is testing the sensitive detectors it carries, capturing their first science readings.
Sep 23, 2021 · The James Webb Space Telescope will let scientists study small, rocky planets around distant stars in more detail than ever before. After decades of work, it could head into orbit later this year.
Sep 12, 2023 · Nasa's James Webb Space Telescope may have discovered tentative evidence of a sign of life on a faraway planet. It may have detected a molecule called dimethyl sulphide (DMS). On Earth, at...
