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In 1687 Sir Isaac Newton published his magnum opus, Philosophi Naturalis Principia Mathematica which effectively synthesized his theories of motion, velocity, and universal gravitation. In the latter case, Newton offered a way to calculate the gravitational force and predict the orbits of the planets. Since then, astronomers have discovered that the Solar System is just a tiny point of light orbiting the center of the Milky Way Galaxy. Occasionally, other stars will pass near the Solar System, which can cause dramatic oscillations that can kick objects out of their orbits. These “traverses of the stars” are common and play an important role in the long-term evolution of planetary systems. As a result, the long-term stability of the Solar System has been the subject of scientific investigation for centuries. According to a new study by a team of Canadian astrophysicists, the inhabitants of the Solar System may be calm. After conducting a series of simulations, they deter...

An artist’s depiction of a bacterial cell. Credit: Centers for Disease Control and Prevention/James Archer Since its inception, chemotherapy has proven to be a valuable tool in treating many types of cancer, but it has significant drawbacks. Apart from killing cancer cells, it can also destroy healthy cells such as those in hair follicles, causing baldness, and those that line the stomach, resulting in nausea. Now, scientists at the California Institute of Technology (Caltech) may have a better solution: voice-controlled, genetically engineered bacteria that seek out and destroy cancer cells. In a new paper published in the journal Nature Communication Nature Communications is a peer-reviewed, open-access, multidisciplinary scientific journal published by Nature Research. It covers the natural sciences, including physics, biology, chemistry, medicine, and earth sciences. It began publishing in 2010 and has editorial offices in London, Berlin, New York City, and Shanghai. ...