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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 six species of Lampris have mostly non-overlapping geographical ranges, and can be recognized based on body shape and coloration pattern. [ 6 ] Lampris australensis Underkoffler, Luers, Hyde & Craig, 2018 Southern spotted opah – Southern hemisphere, in the Pacific and Indian oceans.
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 ...
In a bit of ominous news befitting a Friday the 13th: It turns out that the asteroid Apophis could have a very small chance of colliding into Earth in five years, when it is expected to make a ...
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]
[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.
Scatophagidae was first formally described as a family in 1883 by the American ichthyologist Theodore Nicholas Gill. [1] They are classified in the superfamily Siganiodea, along with the rabbitfishes of the family Siganidae, within the suborder Percoidei in the 5th edition of Fishes of the World. [2]
Cirrhigaleus species are typically the larger of the two Squalidae genera, ranging from 120 to 125 cm (47 to 49.5 inches) in length (although the largest species of 160 cm (63 inches), Squalus acanthias, is classified under the Squalus genus, the vast majority of the species within the same genus remain under or around 100 cm (39 inches) in ...