Brown et al. Hasselmo, reviewed by L. Warburg, reviewed by D. Kaye et al. Brook A. Hartmann and L.

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Brown et al. Hasselmo, reviewed by L. Warburg, reviewed by D. Kaye et al. Brook A. Hartmann and L. Guillemin Response D. The kilometer-wide Science Staff Marcia crater at bottom is one of the youngest large craters on Vesta New Products with a small central peak, as well as light and dark streaks on its walls. Johnson et al. Protoplanetary Paradigm A chemical screen using mesenchymal stem C. Russell et al.

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James www. Pain in the same planetary system. Elfenbein et al. Kamada et al. Nelson and A. Austin Virulence or Competition? Sperandio www. Tagliabracci et al. Wang et al. Chong and G. Vos et al. Roberts et al. Periodicals Mail postage publication No. Domestic individual I.

Kohane and J. Shendure www. First class, airmail, student, and emeritus rates on request. Publications Mail Agreement Number Printed in the U. Target in Merkel Cell Carcinoma number. Arora et al. Adair et al. Bard, F. Rostek, J. Turon, S. Supported in part by publication The data are accessible online at Tschumi, F. Joos, M. Gehlen, C. Heinze, Clim. This work is a contribution Zech, Y.

Huang, M. Zech, R. Tarozo, W. Past 7, Zeng, Clim. Past 3, Hodell, C. Charles, F. Sierro, Earth Planet. S1 to S7 Lemieux-Dudon et al. Stenni et al. Switzerland, and the UK. The main logistical support at They later abandoned their excavation, and the exposed painting began to weather.

Aveni,3 Franco Rossi4 its vaulted ceiling, were once covered by mural paintings. The fourth south wall consisted main- Maya astronomical tables are recognized in bark-paper books from the Late Postclassic period ly of a doorway, with the remainder destroyed by to C. In , the looters. The state of preservation of the murals a small painted room was excavated at the extensive ancient Maya ruins of Xultun, Guatemala, varies considerably, owing to the damaging ef- dating to the early 9th century C.

The walls and ceiling of the room are painted with several fects of water, roots, and insects. The east wall, human figures. Two walls also display a large number of delicate black, red, and incised hieroglyphs. The paintings on the east wall include a large These apparently represent early astronomical tables and may shed light on the later books. The most recent of line near the two possibly three seated figures astronomical proficiency, believed by these phases saw the room filled with rubble and that once dominated the imagery.

Thin coats of many to be on par with that of the cultures earth, and the final phase built over it, effectively plaster were reapplied over existing texts to pro- of the ancient Middle East. Most of what we preserving its interior paintings. Still other texts are know about Maya astronomical methodology, cavation broke through this final-phase veneer and incised into the plaster surface.

Here we report on a source several cen- turies earlier, a wall painting accompanied by a numerical table and a series of long numbers that appear to have functioned like those found in astronomical tables in the codices.

Though systematic archaeological investiga- tions began only in 1 , the Maya ruins of Xultun, Guatemala, were first reported in 2. In March , Maxwell Chamberlain identified the pres- ence of a heavily eroded mural painting on the west wall of a small masonry-vaulted structure exposed by looting 5. The structure Fig.


Ancient Maya astronomical tables from Xultun, Guatemala.

Brazuru Ancient Maya astronomical tables from Xultun, Guatemala. Thank you for your interest in spreading the word about Science. The ancient Mayans in a similar fashion erected many stelas to mark important royal occasions, such as the birth or accession to the throne of their kings. Quasicrystals Tessellating tiny tetrahedrons. A Date of Opportunity.




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