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[15] [16] The Moon's gravitational pull stabilised Earth's fluctuating axis of rotation, setting up regular climatic conditions favoring abiogenesis. [17] 4404 Ma Evidence of the first liquid water on Earth which were found in the oldest known zircon crystals. [18] 4280–3770 Ma Earliest possible appearance of life on Earth. [19] [20] [21] [22]
Frog fossils have been found on all of the Earth's continents. [ 41 ] [ 42 ] In 2020, it was announced that 40 million year old helmeted frog fossils had been discovered by a team of vertebrate palaeontologists in Seymour Island on the Antarctic Peninsula , indicating that this region was once home to frogs related to those now living in South ...
The history of life on Earth traces the processes by which living and extinct organisms evolved, from the earliest emergence of life to the present day. Earth formed about 4.5 billion years ago (abbreviated as Ga, for gigaannum) and evidence suggests that life emerged prior to 3.7 Ga. [1] [2] [3] The similarities among all known present-day species indicate that they have diverged through the ...
c. 1.8–0.8 Ma – colonisation of Eurasia by Homo erectus. c. 1.5 Ma – earliest possible evidence of the controlled use of fire by Homo erectus; c. 1.2 Ma – Homo antecessor evolves. Paranthropus dies out. c. 0.79 Ma – earliest demonstrable evidence of the controlled use of fire by Homo erectus; c. 0.7 Ma – last reversal of the Earth's ...
The first eon in Earth's history, the Hadean, begins with the Earth's formation and is followed by the Archean eon at 3.8 Ga. [2]: 145 The oldest rocks found on Earth date to about 4.0 Ga, and the oldest detrital zircon crystals in rocks to about 4.4 Ga, [34] [35] [36] soon after the formation of the Earth's crust and the Earth
Image credits: ghgjgmhngbfghc There are over 7,000 frog and toad species on planet Earth, and they have been around for more than 200 million years, at least as long as the dinosaurs!. The world's ...
This makes the species even more unique, as PLOS One said, because other frogs that skip the egg step typically give birth to froglets, or baby frogs, but these frogs still give birth to tadpoles.
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