For a summary of the theory just previous to the development of the new methods the reader is referred to a lecture of the author, Atomic Theory and Mechanics,œ published In this periodical ...

WASHINGTON (AP) — The Trump administration has granted nearly 70 coal-fired power plants a two-year exemption from federal requirements to reduce emissions of toxic chemicals such as mercury ...

Factors influencing the proportioning of machine elements: stresses, deformations, and failure criteria as applied to shafts, springs, belts, bearings, gears. Design of Elements is a required course ...

Don't miss out on the headlines from Entertainment. Followed categories will be added to My News. The six women – including pop star Katy Perry and Jeff Bezos’ fiancee Lauren Sanchez ...

Apr. 9, 2025 — Astronomers have peered back in time to find what looks like a population of 'hidden' galaxies that could hold the key to unlocking some of the universe's secrets. If their ...

Over 120 years ago, sponge divers off the coast of the Greek island Antikythera unearthed one of the most enigmatic ...

The film “1-800-ON-HER-OWN” follows the fiercely independent artist as she tries a career first: writing a song with another artist. By Alissa Wilkinson This deliciously nasty reworking of the ...

The scientists made a computer model of the solar nebula—the disk of gas and dust from which the Sun and planets formed 4.6 billion years ago. The primordial debris included icy grains ...

Built between 1774 and 1781, this accurately working model of our solar system provides an up-to-date and realistic image of the positions of the Sun, the Moon, the Earth and the five other planets ...

Apr. 16, 2025 — Astronomers have found a planet that orbits at an angle of 90 degrees around a rare pair of peculiar stars. This is the first time we have strong evidence for one of these 'polar ...