That is what makes this subject so fertile for researchers and so humbling for seers.
So perhaps it's not surprising that the ground is fertile for some kind of backlash against Barcelona.
The females will probably be fertile for another eight to ten years, so there is still plenty of time.
The first half of 2009 was fertile for investment bankers as markets rebounded and companies (not least banks themselves) rushed to raise debt and equity.
Palamida also searches for other types of files, including video and audio, fertile territory for lawsuits.
Car futurology is fertile territory for a museum devoted to collecting and studying 20th-century objects.
The region is fertile ground for wine enthusiasts willing to take a chance on the unexpected.
The record industry has long viewed college campuses as fertile ground for introducing new music.
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Twitter, with its propensity to mock just about everything, was an especially fertile ground for divisiveness.
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The most fertile areas for innovation become clear in this atoms versus bits view.
Mobile platforms like the iPhone and the upcoming iPad are also fertile ground for new developers.
There was suffering but not fertile ground for a compelling economic growth argument from Dole-Kemp.
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This state of affairs should have provided fertile ground for the nationalist parties to hoe.
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Tablets, though, appear to be a fertile ground for Microsoft to make a late, but successful entrance.
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But they also agree that its past is fertile territory for anyone with a grudge against the department.
At the same time, Halbrook says there is fertile ground for future challenges, whether by lawsuit or other means.
Not because America's unsteady recovery is such fertile ground for him, but because the alternative would probably be far worse.
This is partly because all four states holding same-sex marriage votes are, to varying degrees, fertile ground for gay-marriage campaigners.
Others are geared to those withdrawing money from company plans to invest on their own, fertile ground for a financial adviser.
The fear is that such broad patents will keep drugmakers away from what could be fertile territory for discovering new medicines.
Loaded with examples of rapid growth in sales and profits, the 100 Best Small Companies list is fertile ground for growth stocks.
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Austerity is also providing fertile ground for the growth of organised crime.
The culture of sharing appears to also create fertile ground for cheating.
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It's a partnership that might have been hard to come by if Internet2 wasn't around to serve as fertile ground for networking innovation.
That, and the fact that it is perfectly acceptable to start drinking at 3pm on a weekday, fosters a fertile environment for new ideas.
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Ella, with its verdant hills and cool nights, is fertile ground for growing many of these spices, such as cardamom, curry leaves and turmeric.
"But we think that there's a lot of fertile ground for innovation and exploration in that area, so that's what we're doing, " he added.
Their misunderstood era and countless others are fertile ground for Hajdu.
According to Foster spinoffs are often fertile territory for would-be acquirers.
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High-end fashion apparel and accessories are also fertile ground for investors.
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