Reference Terms
from Wikipedia, the free encyclopedia
Vehicle propulsion
Propulsion is a means of creating force leading to movement.
A propulsion system has a source of mechanical power (some type of engine or motor, muscles), and some means of using this power to generate force, such as wheel and axles, propellers, a propulsive nozzle, wings, fins or legs.
Other components such as clutches, gearboxes and so forth may be needed to connect the power source to the force generating component.
The term propulsion is derived from two Latin words: pro meaning before or forwards and pellere meaning to drive.
Related Stories
1
2
Science & Society News
April 28, 2026
Apr. 28, 2026 A new study suggests Neanderthals didn’t go extinct simply because of climate change or competition with Homo sapiens. Instead, the key difference may have been social connectivity—Homo sapiens formed stronger, more flexible networks that helped ...
Apr. 27, 2026 The mysterious collapse of the Maya civilization may not have been driven solely by drought after all. New evidence from lake sediments in Guatemala reveals that one key city, Itzan, enjoyed a stable climate even as its population abruptly vanished. ...
Apr. 27, 2026 Scientists are making a major leap toward freezing organs for future use without damaging them. A new study reveals that one of the biggest obstacles—cracking during ultra-cold preservation—can be reduced by carefully tuning the temperature at ...
Apr. 25, 2026 Beneath East Africa’s Turkana Rift, scientists have found the crust is thinning to a critical point, suggesting the continent is gradually breaking apart. This “necking” process marks an ...
Apr. 23, 2026 A newly confirmed mass grave in ancient Jordan offers chilling insight into one of history’s first pandemics. Hundreds of plague victims were buried within days, revealing how the Plague of Justinian devastated entire communities. The findings ...
Apr. 21, 2026 A light-sensitive crystal is opening the door to a new era of “light-written” technology. Arsenic trisulfide can be reshaped and permanently altered using simple light, creating ultra-fine optical patterns without expensive manufacturing tools. ...
Apr. 20, 2026 AI-powered personas are becoming so realistic that they can infiltrate online communities and subtly steer public opinion. Unlike traditional bots, they adapt, coordinate, and refine their messaging at a massive scale, creating a false sense of ...
Apr. 19, 2026 Human societies didn’t just adapt to the planet—they learned to reshape it. From early fire use to today’s global supply chains, our cultural and social innovations have unlocked extraordinary power to transform Earth and improve human life. ...
Apr. 19, 2026 Calling AI things like “smart” or saying it “knows” something might sound harmless, but it can quietly mislead people about what AI actually does. A new study shows that news writers are more careful than expected, rarely using strongly ...
Apr. 16, 2026 The ozone layer has been on track to recover thanks to the Montreal Protocol—but a loophole may be holding it back. Chemicals still permitted for industrial use are leaking into the atmosphere at higher rates than expected. Scientists now estimate ...
Apr. 9, 2026 Earth’s nights are steadily getting brighter overall, but the changes vary dramatically by region. Rapid urban growth is lighting up countries like China and India, while parts of Europe are dimming due to energy-saving efforts and new lighting ...
Apr. 5, 2026 Modern food systems may look stable on the surface, but they are increasingly dependent on digital systems that can quietly become a major point of failure. Today, food must be “recognized” by databases and automated platforms to be transported, ...
Latest Headlines
updated 12:56 pm ET
Apr. 26, 2026 Scientists have uncovered a surprising new picture of human origins that challenges the long-held idea of a single ancestral population in Africa. By analyzing genetic data from diverse modern ...
Apr. 22, 2026 Ancient DNA from a tomb near Paris reveals a shocking prehistoric reset: one population vanished and was replaced by newcomers from the south. The two groups show no genetic connection, signaling a ...
Apr. 9, 2026 Scientists have uncovered compelling evidence that humans reached New Guinea and Australia around 60,000 years ago—earlier than some recent theories suggested. By tracing maternal DNA lineages, the ...
Apr. 8, 2026 Early wheat didn’t just grow—it fought. When humans began cultivating fields, plants that could outcompete their neighbors for sunlight and space quickly took over, evolving upright leaves and ...
Apr. 8, 2026 A new international study is shaking up how we think about elite sprinting, arguing there’s no single “perfect” running style behind the world’s fastest athletes. Instead, speed emerges from ...
Apr. 5, 2026 A massive new analysis of over 1,700 languages shows that some long-debated “universal” grammar rules are actually real. By using cutting-edge evolutionary methods, researchers found that ...
Apr. 5, 2026 A hidden Roman sanctuary discovered beneath Frankfurt is offering rare clues about ancient rituals, including possible human sacrifice. With major ...
Apr. 2, 2026 More than 12,000 years ago, Native American hunter-gatherers were already making and using dice—thousands of years before similar tools appeared elsewhere. These bone “binary lots” acted like ...
Apr. 2, 2026 A mysterious Greek inscription found beneath the Great Mosque of Homs could pinpoint the long-debated location of an ancient sun temple. Scholars now ...
Mar. 29, 2026 Scientists may have been unknowingly inflating microplastics pollution estimates, and the surprising source could be their own lab gloves. A University of Michigan study found that common nitrile and ...