What Is Life? Scientists Propose New Machine-Based Theory of Life
A recent study presents a new way to understand life by describing it as a cascade of machines producing machines, spanning from molecular to biosphere levels. What is life? This question remains the ...
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Ancient meteorite discovery may explain Earth’s missing elements
Scientists have long debated why Earth and Mars lack certain essential elements. A new study reveals that these missing ...
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The Wild and Contentious History of Mathematical Symbols
I started teaching in 1977, and across my nearly 50 years, I noticed that students were always interested in the history of ...
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Guided tours of Stanford's SLAC accelerator offer visitors a light-speed peek at science
COME VISIT THE SLAC National Accelerator Laboratory (usually called SLAC), on the edge of the Stanford University campus, to ...
Why are rubies red and emeralds green? Their colors come from the same metal in their atomic structure
Even though emeralds and rubies are very different colors, they both have the same secret ingredient in their atomic ...