It's a Damascus etching. For more info just search 'Damascus'.
an aboriginal knife is a rock to cut stuff!
The yellow stuff on chicken is the fat from it
to cut stuff
they need protection from stuff
stick a knife in it then pull it out , if it has stickie stuff on the knife then you know its not done
usually a knife can opener tweezers tooth pick scissors pliers etc
yellow stuff
well it depends if you are really close to a enemy (even droids) and you knife or shoot like blobs of green or yellow stuff will spray the screen
the yellow stuff is most likely discharge
Yellow stuff
because the stuff they eat
fat