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Dear paleofriends I found bone material in a cave in the Yucatan. Its age is estimated at the Late Pleistocene/Early Holocene boundary. I know it's a fibula, its length 37 cm. Could you help me identify? Thanks Kind regards

Hello everyone! my daughter asked me if something we saw in the akumal coast is a fossil or else. Of course we did not remove, we just took a video underwater, of which this screenshot is taken from thank you!

Iridium in undersea crater confirms asteroid wiped out the dinosaurs Hamish Johnston, Physics World, February 24, 2021, https://physicsworld.com/a/iridium-in-undersea-crater-confirms-asteroid-wiped-out-the-dinosaurs/ Tha paper is: Goderis, S., Sato, H., Ferrière, L, et al. 2021, Globally distributed iridium layer preserved within the Chicxulub impact structure Science Advances 24 Feb 2021: Vol. 7, no. 9, eabe3647 https://advances.sciencemag.org/content/7/9/eabe3647 There are arguments that seismic waves from the Chicxulub impact did a superfrack job on the Deccan volcanoes and magnified their eruptions. Go see; Richards, M.A., Alvarez, W., Self, S., Karlstrom, L., Renne, P.R., Manga, M., Sprain, C.J., Smit, J., Vanderkluysen, L. and Gibson, S.A., 2015. Triggering of the largest Deccan eruptions by the impact. Geological Society of America Bulletin, 127(11-12), pp.1507-1520. http://eprints.esc.cam.ac.uk/3289/1/Gibson bul gsa.pdf http://pages.uoregon.edu/leif/resources/papers/GSAB_2015_Richards.pdf https://pubs.geoscienceworld.org/gsa/gsabulletin/article-abstract/127/1112/1507/126064 Commentary on flood basalts and mass extinctions: Ernst, R.E. and Youbi, N., 2017. How Large Igneous Provinces affect global climate, sometimes cause mass extinctions, and represent natural markers in the geological record. Palaeogeography, palaeoclimatology, palaeoecology, 478, pp.30-52. Link, Ernst and Youbi (2017), at bottom of page at http://www.largeigneousprovinces.org/downloads http://www.largeigneousprovinces.org/sites/default/files2/Ernst and Youbi 2017 PPP.PDF https://www.sciencedirect.com/science/article/pii/S0031018217302857 Yours, Paul H.

Astronomers: A comet fragment, not an asteroid, killed off the dinosaurs Jupiter's gravity pushed comet toward Sun; comet was ripped apart by tidal forces. Jennifer Ouellette, ArsTechnica, February 15, 2021 https://arstechnica.com/science/2021/02/astronomers-a-comet-fragment-not-an-asteroid-killed-off-the-dinosaurs/ The open access paper is: Siraj, A. and Loeb, A., Breakup of a Long-Period Comet as the Origin of the Dinosaur Extinction. Scientific Reports volume 11, Article number: 3803 (2021) https://www.nature.com/articles/s41598-021-82320-2 https://www.cfa.harvard.edu/~loeb/SLD.pdf Keep warm and safe out there Paul H.

Ancient human, giant sloth remains found in world's biggest flooded cave. Bones of Ice Age animals, including elephants and bears, found in Sac Actun system in Mexico. Thomson Reuters Posted: Feb 20, 2018 http://www.cbc.ca/news/technology/mexico-flooded-cave-1.4543416 https://www.gob.mx/cultura/prensa/dan-a-conocer-hallazgos-en-el-sitio-arqueologico-sumergido-sac-actun Yours, Paul H.

Ancient species of giant sloth discovered in Mexico Borneo Bulletin, August 18, 2017 https://borneobulletin.com.bn/ancient-species-giant-sloth-discovered-mexico/ Fossilized remains of a giant sloth unearthed in Mexico By Victoria Ritter, Gears of Biz, August 20, 2017 http://gearsofbiz.com/fossilized-remains-of-a-giant-sloth-unearthed-in-mexico/16015 Ancient Giant Sloth Fossil Found in Underwater Cave While cave diving in Mexico, explorers uncovered 10,000- year-old remains of a new sloth species, National Geographic http://news.nationalgeographic.com/2017/08/ancient-giant-sloth-new-species-mexico-cave-spd/ The paper is: Stinnesbeck, S.R., Frey, E., Olguín, J.A., Stinnesbeck, W., Zell, P., Mallison, H., González, A.G., Núñez, E.A., Morlet, A.V., Mata, A.T. and Sanvicente, M.B., Xibalbaonyx oviceps, a new megalonychid ground sloth (Folivora, Xenarthra) from the Late Pleistocene of the Yucatán Peninsula, Mexico, and its paleobiogeographic significance. PalZ, pp.1-27. https://link.springer.com/article/10.1007/s12542-017-0349-5 Yours, Paul H.