Contentious debates about "peak oil" aside, imagining how the world looks post oil is increasingly easy as alternatives to fossil fuel develop rapidly.
The six-month moratorium on new deepwater offshore drilling announced by President Obama Thursday isn't likely to have a big impact on the oil industry – unless it's a sign of things to come.
But some wildcatters pack up their drill bits as the exploration rush has cooled.
Energy costs have become a driving force of inflation.
With prices at $120 a barrel, Americans are facing an oil adjustment.
Speculation and a falling dollar may now be as important as supply and demand, analysts say.
Should the national oil company allowing private investments? Critics worry about foreign control.