Australia regained the Ashes when they won the third cricket Test against England by 206 runs at the WACA Ground.
The Australians bowled England out for 350 in their second innings to take an unbeatable 3-0 lead in the best of five series following wins in the first two Tests in Brisbane and Adelaide.
The series now moves on to the fourth and fifth Tests in Melbourne and Sydney where the only interest will be whether England can avoid a demoralising clean sweep.
England fought hard to salvage the third Test and were led by defiant second innings by Alastair Cook (116), Ian Bell (87) and Kevin Pietersen with 60 not out. But the task of batting for just over two days proved too much.
Cook was superb in his first Test century against Australia but when he was dismissed in the third last over of the fourth day, the writing was on the wall.
The loss here adds to a wretched series for the English, who went into the first Test in Brisbane underdone and carrying players who were obviously out of form.
They offered more resistance in Adelaide until a spectacular batting collapse on the final day handed Australia a completely unexpected victory.
Leg-spinner Shane Warne said Adelaide was the turning point.
"To win that game there was something special," he said. "It showed we can do special things like that."
Following sustained criticism of team selection the English finally included spinner Monty Panesar for the Perth Test, and he took eight wickets in the match.
But the brutal assault on the English bowling by Adam Gilchrist and Michael Clarke after tea on the third day made the tourists' task of saving this Test and staying in the series almost impossible.
The loss will certainly lead to increased pressure on England coach Duncan Fletcher and skipper Andrew Flintoff while Australia have the luxury of taking to Melbourne a squad of players who are injury-free, in form and settled.
Final scoreboard:
Australia 1st innings 244 (M. Hussey 74no, M. Panesar 5-92, S. Harmison 4-48)
England 1st innings 215 (K. Pietersen 70)
Australia 2nd innings 527 for five declared (M. Clarke 135 not out, M. Hussey 103, A. Gilchrist 102 not out).
England 2nd innings (265 for 5 overnight)
A. Strauss lbw b Lee 0
A. Cook c Gilchrist b McGrath 116
I. Bell c Langer b Warne 87
P. Collingwood c Gilchrist b Clark 5
K. Pietersen not out 60
M. Hoggard b McGrath 0
A. Flintoff b Warne 51
G. Jones run out 0
S. Mahmood lbw b Clark 4
S. Harmison lbw b Warne 0
M. Panesar b Warne 1
Extras (5nb 6w 8lb 7b) 26
Total 350
Fall of wickets: 1-0, 2-170, 3-185, 4-261, 5-261, 6-336, 7-336, 8-345, 9-346, 10-350
Bowling: Lee 22-3-75-1 (1nb), McGrath 27-9-61-2 (4nb 1w), Clark 25-7-56-2, Warne 39.2-6-115-4, Symonds 9-1-28-0 (5w)
Overs: 122.2
Result: Australia won by 206 runs to lead series 3-0
Toss: Australia
Umpires: Arleem Dar (PAK) Rudi Koertzen (RSA)
Match referee: Jeff Crowe (NZL)
Man of the match: Mike Hussey (AUS)
... Its Australia man ... Last Ashes to chilo Just ekta Mistake 
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