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[ dubious ]
Polonnaruwa | |
---|---|
Type | Fulgarite. [1] |
Composition | Olivine. [2] |
Country | North Central Province, Sri Lanka |
Region | Araganwila village |
Coordinates | 7 52' 59.5" N; 81 9' 15.7" E |
Observed fall | Alleged. [3] |
Fall date | Allegedly fell on 29 December 2012. [3] |
Found date | Not published. [2] |
TKW | Not published. [2] |
The Polonnaruwa meteorite is an alleged meteorite that fell on 29 December 2012 close to the city of Polonnaruwa in Sri Lanka, and recovered soon after by Chandra Wickramasinghe's team. [2] [4] [5] [6]
Twelve days after the Polonnaruwa meteorite was "seen falling" to Earth, Chandra Wickramasinghe published in the online fringe science [7] Journal of Cosmology that, after studying some electron micrographs, his team discovered fossilized diatoms (microscopic phytoplankton) inside the meteorite as well as cells similar to those found in the Red rain in Kerala that fell in 2001. [2] [5] In addition, his team of scientists reported in a separate article that they are certain that it is a meteorite that originated from a comet and that it also contained living diatoms. [5] [6]
The claims that the rock is a meteorite are rejected by other scientists. [3] [8] [1] so it was not recorded in the international Meteoritical Society database.
Wickramasinghe claimed that these microorganisms constitute strong evidence for panspermia, [2]
On 15 January 2013 a diatom expert, Patrick Kociolek, verified that the forms pointed out in the paper are indeed diatoms. Then he added:
"There certainly is not any sign of this being fossilized material. (...) the diversity present in the images represent a wide range of evolutionary history, such that the 'source' of the diatoms from outer space, must have gone through the same evolutionary events as here on Earth. There are no extinct taxa found, only ones we would find living today. For me it is a clear case of contamination with freshwater."
— Patrick Kociolek, [3]
Meanwhile, PZ Myers, who studies evolutionary developmental biology, questions "why a space organism would evolve to look exactly like a species that evolved in a completely different environment, and how it could have converged in all its details on such remarkable similarity to a specific Earthly species? Why, we might even suggest that it clearly looks like contamination." [9]
Wickramasinghe's research paper was not peer reviewed by experts prior to publication, and early on, there were claims that Wickramasinghe's article was not an examination of a meteorite but of some terrestrial rock. [3] [10] Scientists from the Peradeniya University Geology Division, and the Department of Forensic Medicine, as well as the Arthur C. Clarke Institute for Modern Technologies in Sri Lanka examined fragments of the alleged meteorite, and concluded that it is a terrestrial rock formed by lightning strikes (fulgurite). [1] [11] [12] The silica and quartz bulk content confirms the terrestrial fulgurite explanation, and further discards the meteorite hypothesis, as any silica in a meteorite would be present in trace amounts. [13] Following a 29 April 2013 media briefing, Professor of Geology Athula Senarathna of the University of Peradeniya who carried out a research on the alleged meteorite, said that "there could not be any truth in Prof. Chandra Wickramasinghe's claim". [8]
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