Can alien civilizations detect humanity?

One of the fascinating things about being a human in this age is that we can do more than wonder about other life and other civilizations. We can actually look for them, although there are obvious limitations to our search. ...

A method to straighten curved space-time

One of the greatest challenges of modern physics is to find a coherent method for describing phenomena, on the cosmic and microscale. For over a hundred years, to describe reality on a cosmic scale we have been using general ...

Study shows a decrease in Indian Ocean cyclones

While the threat of tropical cyclones increases around the world, a new study published in Nature Communications shows one area experienced a significant decline in cyclone activity. But, with recent changes in climatic patterns ...

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Equation

An equation is a mathematical statement that asserts the equality of two expressions. In modern notation, this is written by placing the expressions on either side of an equals sign (=), for example

asserts that x+3 is equal to 5. The = symbol was invented by Robert Recorde (1510–1558), who considered that nothing could be more equal than parallel straight lines with the same length.

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