Including Original "Paul H. Letters" Copyright © 1996-2018 Paul V. Heinrich - All rights reserved.



Monday, 23 April 2018

Diamonds from Meteorite Might Have Formed Inside a Long-lost Planet

Diamonds from Meteorite Might Have Formed Inside a Long-lost Planet

These diamonds from space formed inside a long-lost planet,
scientists say. By Sarah Kaplan, Washington Post, April 17, 2018

The open access paper is:

Farhang Nabiei, James Badro, Teresa Dennenwaldt, Emad Oveisi,
Marco Cantoni, Cécile Hébert, Ahmed El Goresy, Jean-Alix Barrat,
and Philippe Gillet, 2018, A large planetary body inferred from
diamond inclusions in a ureilite meteorite Nature Communications
volume 9, Article number: 1327 (2018) doi:10.1038/s41467-018-03808-6

Supplementary Information at:

The reviewer's comments from peer-review are included.
It is chance to see how scientists conduct peer-review.

Reviewers comments at:

Yours,

Paul H.

Myths and Realities of Bayesian Chronological Modeling


Hamilton, W. D. and Krus, A. M. (2017) The myths
and realities of Bayesian chronological modeling
revealed. American Antiquity, (doi:10.1017/aaq.2017.57)

Paper (PDF):

Abstract:

Erratum:

Yours,

Paul H.

SETI, The Silurian Hypothesis, and Defining the Anthropocene

SETI, The Silurian Hypothesis, and Defining the Anthropocene

Was There a Civilization On Earth Before Humans? Adam Frank, The Atlantic, April 13, 2018
https://www.theatlantic.com/science/archive/2018/04/are-we-earths-only-civilization/557180/

Schmidt, G.A. and Frank, A., 2018. The Silurian hypothesis: would it be possible to detect an industrial civilization in the geological record? International Journal of Astrobiology, pp. 1-9.
https://arxiv.org/abs/1804.03748

https://www.cambridge.org/core/journals/international-journal-of-astrobiology/article/silurian-hypothesis-would-it-be-possible-to-detect-an-industrial-civilization-in-the-geological-record/77818514AA6907750B8F4339F7C70EC6

There are two very good books that discuss what a technological civilization, ours, would leave behind in the archaeological – geological record.

They are;

Weisman, A., 2008. The world without us. Macmillan.
0312427905, 9780312427900

and

Zalasiewicz, J. and Freedman, K., 2009. The Earth after us: what legacy will humans leave in the rocks?.
Oxford University Press. 0199214980, 9780199214983

Dr. Zalasiewicz has written a papers about the Anthropocene and the signature and traces that would survive in the geologic record. Examples are:

Zalasiewicz, J., Waters, C.N. and Williams, M., 2014.Human bioturbation, and the subterranean landscape of the Anthropocene. Anthropocene, 6, pp. 3-9.
https://www.researchgate.net/publication/264241410_Human_bioturbation_and_the_subterranean_landscape_of_the_Anthropocene

and

Zalasiewicz, J., Williams, M., Waters, C.N., Barnosky, A.D. and Haff, P., 2014. The technofossil record of humans. The Anthropocene Review, 1(1), pp. 34-43.
https://www.researchgate.net/publication/264461538_The_technofossil_record_of_humans

Related papers can be found at:

Jan Zalasiewicz, University of Leicester, Department of Geology,
https://www.researchgate.net/profile/Jan_Zalasiewicz

Yours,

Paul H.

"The past is never dead. It's not even past."
William Faulkner, Act 1, Scene III, Requiem for a Nun (1951)

Tuesday, 10 April 2018

Oldest magnetic record in the solar system discovered in a meteorite

Oldest magnetic record in the solar system discovered in a meteorite

Oldest magnetic record in the solar system discovered in a meteorite by Lisa Zyga, Phys.org, April 5, 2018
https://phys.org/news/2018-04-oldest-magnetic-solar-meteorite.html

http://www.nhm.ac.uk/discover/news/2018/march/meteorite-reveals-the-oldest-magnets-in-the-solar-system.html

The paper is:

Shah, J., Williams, W., Almeida, T.P., Nagy, L., Muxworthy, A.R., Kovács, A., Valdez-Grijalva, M.A., Fabian, K., Russell, S.S., Genge, M.J. and Dunin-Borkowski, R.E., 2018. The oldest magnetic record in our solar system identified using nanometric imaging and numerical modeling. Nature communications, 9(1), p. 1173.

Yours,

Paul H.