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Of these, 26 have a good probability to come within 1.0 parsec (3.3 light-years) and 7 within 0.5 parsecs (1.6 light-years). [ 31 ] The energy released from the impact of an asteroid or comet with a diameter of 5–10 km (3–6 mi) or larger is sufficient to create a global environmental disaster and cause a statistically significant increase ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 31 January 2025. Scientific projections regarding the far future Several terms redirect here. For other uses, see List of numbers and List of years. Artist's concept of the Earth 5–7.5 billion years from now, when the Sun has become a red giant While the future cannot be predicted with certainty ...
The length of a full four-year term of office for a president of the United States usually amounts to 1,461 days (three common years of 365 days plus one leap year of 366 days). The listed number of days is calculated as the difference between dates , which counts the number of calendar days except the first day ( day zero ).
A book Macrobii ("Long-Livers") is a work devoted to longevity. It was attributed to the ancient Greek author Lucian, although it is now accepted that he could not have written it. [55] Most examples given in it are lifespans of 80 to 100 years, but some are much longer: Tiresias, the blind seer of Thebes, over 600 years. [citation needed]
Earth formed in this manner about 4.54 billion years ago (with an uncertainty of 1%) [25] [26] [4] and was largely completed within 10–20 million years. [27] In June 2023, scientists reported evidence that the planet Earth may have formed in just three million years, much faster than the 10−100 million years thought earlier.
More than 99 percent of all species that ever lived (over five billion) [1] are estimated to be extinct. [2] [3] Estimates on the number of Earth's current species range from 10 million to 14 million, [4] with about 1.2 million or 14% documented, the rest not yet described. [5]
On Dec. 10, 1624, a Dutch water authority sold a bond for 1,200 Carolus guilders to a woman in Amsterdam, promising to pay 2.5% interest in perpetuity. A forever bond issued 400 years ago still ...
The 42 puzzle orthorectified (1), and the number 42 hidden as binary (2), Hindu-Arabic numerals (3) and Roman numerals (4) The 42 Puzzle is a game devised by Douglas Adams in 1994 for the United States series of The Hitchhiker's Guide to the Galaxy books. The puzzle is an illustration consisting of 42 multi-coloured balls, in 7 columns and 6 rows.