Home

The sword of a Hispano-Muslim warlord is digitized in 3-D

Leave a comment

Republication from  phys.org/

by

Photo Credit: Ingheritag3D

At age 90, Ali Atar, one of the main military chiefs of King Boabdil of Granada, fought to his death in the Battle of Lucena in 1483. It was there that his magnificent Nasrid sword was taken away from him, and researchers from the Polytechnic University of Valencia and a company from Toledo have now modeled it in order to graphically document and present it on the web.

More

Χάραλντ Χαρντράντα: Ο μισθοφόρος του Βυζαντίου που έγινε βασιλιάς της Νορβηγίας

Leave a comment

Αναδημοισίευση από το ιστολόγιο cognoscoteam.gr/

Γράφει ο Ηλίας Αναγνωστάκης

Ο πιο διασημος Σκανδιναυος ολων των εποχων, ειναι φυσικα ο Harald Handraada (1015-1066), του οποιου η ζωη λιγο απεχει απο το χαρακτηριστει ενα επος. Γεννημενος στα τελη του 1015 στο Ringerike της Νορβηγιας, ο νεαρος Harald εδειξε απο νωρις τις εκπληκτικες ηγετικες και στρατιωτικες του δυνατοτητες. Με υψος 5 «ells» ( περ 2.05μ) και «δυναμη αρκουδας» ( Heimisgrilla Saga 54-D) ο νεαροτατος (μολις 15 ετων) Harald συμμετειχε με 600 ανδρες απο τα Upplands στο πλευρο του αδερφου του Ολαφ του «Αγιου» στη φοβερη μαχη του Stiklesand, εναντιον των Δανων το 1030. Ο Ολαφ σκοτωθηκε, οι Νορβηγοι ηττηθηκαν, αλλα ο Harald κατορθωσε να διαφυγει παροτι βαρια τραυματισμενος.

More

Santorini volcano, a new terrestrial analogue of Mars

Leave a comment

Republication from Sinc

Photo credit: Nextvoyage-Pixabay/NASA/JPL-Caltech/MSSS

.

By Enrique Sacristán

The Greek island of Santorini is now one of the most popular tourist destinations in the Mediterranean, but 3,600 years ago it suffered one of the largest volcanic eruptions recorded in history. Among the material that has been exposed, scientists have now found rocks similar to those of Mars.

“In the Balos Cove –located to the south of the island – we have discovered basalts such as those that have been identified by the rovers on Mars and with properties similar to those of certain meteorites from the red planet and those of terrestrial rocks classified as Martian analogues,” points out Ioannis Baziotis, a researcher at the Agricultural University of Athens and co-author of the study, recently published in Icarus journal.

More specifically, the authors have confirmed that this basaltic material is equivalent to that located by the Spirit and Curiosity rovers in the Gusev and Gale craters of the red planet, and that its chemical and mineralogical composition resembles that of genuinely Martian meteorites (olivine-phyric shergottites) and similar Martian samples included in The International Space Analogue Rockstore (ISAR), a collection of terrestrial rocks used to test and calibrate instruments that will fly on space missions.

Continue reading

 

 

Four ways in which Leonardo da Vinci was ahead of his time

Leave a comment

Republication from The Conversation

 

The prototype design of Da Vinci’s “tank”

.

Leonardo da Vinci is generally recognised as one of the great figures of the Renaissance and one of the greatest ever polymaths. As the world marks the 500th anniversary of his death, it’s important to look at some of the ways in which he showed that – as well as being a painter, sculptor and engineer – he was a thinker who was way ahead of his time.

Engineering – Dr Hywel Jones

Leonardo da Vinci is renowned as much for his inventions as his works of art, studies of architecture and anatomical drawings. The documents that survive show us his ideas for a wide range of devices. They include some of the first concepts for gliders, helicopters, parachutes, diving suits, cranes, gearboxes and many types of weapons of war. Many of these may be seen in use today, having taken the best part of 400 years to become practical realities.

More

Aztec warriors of the Jaguar Order

Leave a comment

A beatiful artwork of Aztec warriors of the Jaguar Order preparing an ambush for the Spanish invaders. Artist unknown. The Spaniards paid a heavy toll till the final subjection of the native peoples of Mexico.
More

Maya more warlike than previously thought

Leave a comment

Republication from  news.berkeley.edu (UNIVERSITY OF CALIFORNIA BERKELEY)

 

David Wahl (right) and Lysanna Anderson taking a sample from Lake Ek’Naab using a hand-operated piston core on an inflatable platform. (Photo courtesy of Francisco Estrada-Belli, Tulane University)

.

The Maya of Central America are thought to have been a kinder, gentler civilization, especially compared to the Aztecs of Mexico. At the peak of Mayan culture some 1,500 years ago, warfare seemed ritualistic, designed to extort ransom for captive royalty or to subjugate rival dynasties, with limited impact on the surrounding population.

Only later, archeologists thought, did increasing drought and climate change lead to total warfare — cities and dynasties were wiped off the map in so-called termination events — and the collapse of the lowland Maya civilization around 1,000 A.D. (or C.E., current era).

More

Older Entries