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The Drake equation is a probabilistic argument used to estimate the number of active, communicative extraterrestrial civilizations in the Milky Way Galaxy. [ 1 ] [ 2 ] [ 3 ] The equation was formulated in 1961 by Frank Drake , not for purposes of quantifying the number of civilizations, but as a way to stimulate scientific dialogue at the first ...
The Search for Life: The Drake Equation is a 2010 BBC Four television documentary about that equation, which is a probabilistic argument used to estimate the number of active, communicative extraterrestrial civilizations in the Milky Way galaxy. [1] [2] It was presented by Dallas Campbell.
The Rare Earth equation is Ward and Brownlee's riposte to the Drake equation. It calculates , the number of Earth-like planets in the Milky Way having complex life forms, as: According to Rare Earth, the Cambrian explosion that saw extreme diversification of chordata from simple forms like Pikaia (pictured) was an improbable event.
In 1961, Drake devised the Drake equation, which attempted estimate the number of extraterrestrial civilizations that might be detectable in the Milky Way. [1] [4] The Drake equation has been described as the "second most-famous equation in science", after E=mc 2. [9]
The Drake equation has been used by both optimists and pessimists, with wildly differing results. The first scientific meeting on the search for extraterrestrial intelligence (SETI), which had 10 attendees including Frank Drake and Carl Sagan , speculated that the number of civilizations was roughly between 1,000 and 100,000,000 civilizations ...
You can calculate this ratio by adding up the value of your investments (not including your home equity) and dividing that by your net worth. Generally, you want this ratio to be at least 50% ...
Goldman Sachs CEO David Solomon cautioned Tuesday that mounting U.S. government debt requires immediate attention, pointing to a recent surge in Treasury yields as a signal of market concerns over ...
The Social Security Administration can't calculate the official 2025 COLA until the Labor Department publishes the Consumer Price Index data for September. That will happen on Thursday, Oct. 10 ...