Some scientists are exploring other ideas that could theoretically allow time travel. One concept involves wormholes, or hypothetical tunnels in space that could create shortcuts for journeys across the universe. If someone could build a wormhole and then figure out a way to move one end at close to the speed of light – like the hypothetical spaceship mentioned above – the moving end would age more slowly than the stationary end. Someone who entered the moving end and exited the wormhole through the stationary end would come out in their past.
At its south pole, an underground ocean lies under a thick shell of ice. It may be the source of the watery jets that spray from deep fissures in the moon’s surface. This moon of Jupiter — the largest in the solar system — may have several layers of ice and water between its crust and core, including a large, underground saltwater ocean. Jupiter’s icy moon is strongly suspected of having a subsurface salty ocean.
Lauren Schroeder looks beyond natural selection to rethink human evolution
The cancer likely started off as an immune cell that mutated, multiplied and adapted to survive in the water. A new study challenges a prominent evolutionary theory about why women live long after their childbearing years. Explore the process of scientific inquiry through our interactive Science Flowchart.
Science – How It Works
Topics of interest include the biodiversity, distribution, biomass, and populations of organisms, as well as cooperation and competition within and between species. Ecosystems are dynamically interacting systems of organisms, the communities they make up, and the non-living components of their environment. Ecosystem processes, such as primary production, pedogenesis, nutrient cycling, and niche construction, regulate the flux of energy and matter through an environment. These processes are sustained by organisms with specific life history traits. More broadly, it is the general analysis of nature, conducted in order to understand how the universe behaves. Systems theory is the transdisciplinary study of systems in general, to elucidate principles that can be applied to all types of systems in all fields of research.
In recent years, however, the comet hypothesis has lost favor. “It looks like comets are pretty much out,” says cosmochemist Conel Alexander of the Carnegie Institution for Science in Washington, D.C. Most of the comet water tested so far doesn’t match that of Earth’s oceans.
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Lockheed Martin Space in Littleton, Colorado, built and operates the spacecraft. NASA’s Marshall Space Flight Center in Huntsville, Alabama, manages the Discovery Program for the Science Mission Directorate at NASA Headquarters in Washington. This second image was taken about 6 minutes after closest approach from a distance of approximately 1,010 miles . The spacecraft traveled around 960 miles between the two released images. In the first downlinked images of Dinkinesh and its satellite, which were taken at closest approach, the two lobes of the contact binary happened to lie one behind the other from Lucy’s point of view.