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...[[vacuum]] during a [[time]] interval of <math>\frac{1}{299792458}</math> of a [[second]]. ...he length of a meter, but a square kilometer is one million times the area of a square meter. ...

...access-date=2020-08-26|website=Math Vault|language=en-US}}</ref> The names of the numbers in a subtraction expression are: <math>\textrm{minuend}-\textrm ...cs)#Absolute value|magnitude]], but the opposite [[Sign (mathematics)#Sign of a number|sign]] ([[Operation (mathematics)#Additive inverses (opposites)|op ...

In 1961, [[Frank Drake]] wrote down an equation for the chance of a contactable [[Extraterrestrial life|alien]] [[civilization]] from another :''N'' = the number of [[civilization]]s in our galaxy with which communication might be possible; ...

...;10⁶ seconds = 15.9735 days – [[Half-life (element)|half life]] of [[vanadium]]-48 *1.54&times;10⁶ seconds = 17.81 days – half life of [[californium]]-253 ...

...always be not finished. This happens because there are an infinite amount of numbers. Only [[Wikipedia:Notable|notable]] numbers will be added. Numbers ...t numbers can only be [[Wikipedia:Notable|notable]] if they are a big part of [[history]]. A number isn't [[Wikipedia:Notable|notable]] if it is only rel ...

...50px|The [[Tree of life (biology)|tree of life]] showing the three domains of life on [[Earth]]]] ...ver time and how new [[species]] develop. The [[Scientific theory|theory]] of evolution explains how evolution works, and how living and [[Extinction|ext ...

...the right of an orange circular object representing the Sun| Artist's idea of the [[Earth]] several billion years from now, when the [[Sun]] is a [[red g The ultimate fate of our [[universe]] may be the [[heat death of the universe]] or the [[big rip]]. Before that happens, it is possible to p ...