A Commonplace Book

The former NASA head that brought you the failed, ill-conceived Constellation project does not like NASA's current approach to human sp...

The Pas d’Arms was a very specific format for medieval deeds of arms. It always involved a specified number of defenders agreeing to meet ...

At the Philadelphia Museum of Art . Well worth seeing if you live close enough. For me the high points were two different versions of the Hu...

Image : NASA Opportunity has reached the rim of Endeavour Crater , 14 miles in diameter. Click on the image for a larger view. I wro...

Here. Thanks to Amy Victoria Lindey.

Here Early twentieth century films of armor from the Met being worn, the flexibility of articulation demonstrated, and the resistance of ti...

Mscr.Dresd.C.93 . Volume I of his manual in German in Dresden Mscr.Dresd.C.94 Volume II: Paulus Hector Mair MS from 1550 held at the Unive...

Image: NASA Three football fields in span, with wings like a giant robot dragonfly, the International Space Station falls always toward...

Astronaut Ron Garan photographed this Perseid meteor from the International Space Station. Looking down at a meteor below you: how c...