Economy was brought down by the other successors of Philip. They did not do as well as he did, nor did they pay attention to what was going on. The government taxed heavily small middle class. This caused many to not be able to pay for much.
Researchers at the ARC Centre of Excellence for Design in Light Metals at Monash University in Melbourne have successfully printed two metal jet engines, with a printer. Watch the video above for more about the process.