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99942 Apophis (provisional designation 2004 MN 4) is a near-Earth asteroid and a potentially hazardous object, 450 metres (1,480 ft) by 170 metres (560 ft) in size, [3] that caused a brief period of concern in December 2004 when initial observations indicated a probability of 2.7% that it would hit Earth on Friday, April 13, 2029.
The largest species is the Atlantic spadefish (Chaetodipterus faber) which has a maximum published total length of 91 cm (36 in) while the smallest is the threadfin scat (Rhinoprenes pentanemus) which has a maximum published total length of 15 cm (5.9 in).
Fishes are a paraphyletic group and for this reason, the class Pisces seen in older reference works is no longer used in formal taxonomy.Traditional classification divides fish into three extant classes (Agnatha, Chondrichthyes, and Osteichthyes), and with extinct forms sometimes classified within those groups, sometimes as their own classes: [1]
A menacing asteroid named Apophis is projected to have a close encounter with Earth in 2029, but scientists have long ruled it out as an impact risk. Asteroids safely fly by Earth all the time ...
[15] [16] [17] The actual number of species in the wild is unknown. [18] Gymnotiformes is thought to be the sister group to the Siluriformes [19] [20] from which they diverged in the Cretaceous period (about 120 million years ago). The families have traditionally been classified over suborders and superfamilies as below.
Astronomer Paul Wiegert had found a scenario in which Apophis could be sent careening into Earth in 2029. But we’d have to be extremely unlucky. Asteroid Apophis has the tiniest chance of ...
It gained some public interest when it became clear, in January 2005, that the asteroid 99942 Apophis would miss the Earth in 2029 but may go through one or another keyhole leading to impacts in 2036 or 2037. Further research has since been done, however, which revealed the probability of Apophis passing through the keyhole was extremely low. [1]
Among eight new species of fish identified in Peru's Alto Mayor region this year, the most shocking was the "blob-headed fish," according to a report published this month by the nonprofit group ...