> Its outermost layer is a strip of titanium just a fraction of a millimeter thick and coated on the sun-facing side with charred animal bone. This is the same

> Its outermost layer is a strip of titanium just a fraction of a millimeter thick and coated on the sun-facing side with charred animal bone. This is the same stuff used by prehistoric humans to paint cave walls, but its properties also make it great for radiating heat away from a spacecraft. Is this true? Sounds very sensational press.