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More than 99 percent of all species, amounting to over five billion species, [7] that ever lived on Earth are estimated to be extinct. [8] [9] Estimates on the number of Earth's current species range from 10 million to 14 million, [10] of which about 1.2 million have been documented and over 86 percent have not yet been described. [11]
A May 2016 study based on scaling laws estimated that 1 trillion species (overwhelmingly microbes) are on Earth currently with only one-thousandth of one percent described, [28] [29] though this has been controversial and a 2019 study of varied environmental samples of 16S ribosomal RNA estimated that there exist 0.8-1.6 million species of ...
Treebeard, called by Gandalf the oldest living Ent and the oldest living thing that walks in Middle-earth, [T 1] is described as being around 14 feet (4 m) tall, "Man-like, almost Troll-like", and clad in something that might have been tree-bark, with seven toes, a bushy, "almost twiggy" beard and deep penetrating eyes.
It has been estimated there are as many as 7.77 million animal species on Earth. Animal body lengths range from 8.5 μm (0.00033 in) to 33.6 m (110 ft). They have complex ecologies and interactions with each other and their environments, forming intricate food webs .
The largest animal currently alive is the blue whale. The maximum recorded weight was 190 tonnes (209 US tons) for a specimen measuring 27.6 metres (91 ft), whereas longer ones, up to 33 metres (108 ft), have been recorded but not weighed. [11] [12] [13] It is estimated that this individual could have a mass of 250 tonnes or more.
It is estimated that more than 99% of all species that ever existed on Earth, amounting to over five billion species, [3] are extinct. [4] [5] Earth is the only celestial body known to harbor life forms. No form of extraterrestrial life has yet been discovered. [6]
People magazine has awarded 36 men the coveted title of Sexiest Man Alive. Mel Gibson was the first to receive the title in 1985. John Krasinski currently holds the crown.
This list includes long-lived organisms that are currently still alive as well as those that are dead. Determining the length of an organism's natural lifespan is complicated by many problems of definition and interpretation, as well as by practical difficulties in reliably measuring age, particularly for extremely old organisms and for those ...