The expansion of North American forests may have "pushed the mammoths along", he added.
Wednesday's surge pushed the Dow back into positive territory for the year, up 4%.
Jobs also pushed the very concept of a computer into the future with the iPad.
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The Islanders pushed the pace in the opening minutes and were eventually rewarded for their persistence.
Alvarez pushed the theme of passion and having fun in your work in everything he said.
This advance has pushed the foundation smack into the political issue of stem-cell research.
Mr. Sarkozy pushed the chancellor for a clear public declaration that Europe stood behind Greece.
The passenger escaped as the suspect pushed the cabbie from the Ford Crown Victoria.
The downbeat news pushed the euro to a two-and-a-half-month high against the dollar this week.
The landslip at Stainforth, South Yorkshire, pushed the track upwards forcing the line to shut.
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Could I have pushed the envelope and skipped charging stations just to create drama?
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That pushed the balances up higher and made even the minimum payments more expensive.
It was the son who pushed the father into taking Skechers public in 1999.
Mountain Dew also pushed the marketing boundaries of interactive entertainment with its Mega Fan Experience contest.
The Colombian pushed the German on to the grass in his attempts to hold him off.
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"Investors pushed the shares high because they believed in Apple's magic with devices", he says.
Clever defending by Whittaker pushed the play wide and the danger was snuffed out.
But the Russians quickly rallied and pushed the Polish Army back to the gates of Warsaw.
That drop has made imports more expensive and pushed the rate of inflation up above 10%.
That pushed the percent of Index loans with only incurrence test to a record 30%.
Sir Reg pushed the minister to say whether she was for, or against, the sale.
Immediate Ulster pressure yielded an early penalty but Niall O'Connor pushed the effort just wide.
Did your 240 sometimes not go into overdrive when you pushed the overdrive button?
Tax cuts and increases in defence spending have pushed the budget back into deficit too.
News of modest improvement in the fourth quarter pushed the stock up 23% in mid-February.
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"One of them had his hands up and pushed the other, " she told Norfolk Coroner's Court.
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Ayrow pushed the cab driver to get his local imam to come up with some funds.
He relentlessly beat up on American business and pushed the fear he claimed we should avoid.
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This positive divergence, line b, was a sign that fewer sellers had pushed the market lower.
Moreover, pre-launch europhoria had pushed the embryo currency up sharply during the second half of 1998.
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