Research is currently being conducted in Western Darfur in an effort to better understand how communities respond to the challenge of supporting separated children and elderly people living together.

Lee acknowledged previous U.S. government technology competitions like the Defense Advanced Research Projects Agency's Robotics Challenge and asked when the next one would be, in order to help identify the next visionaries.

This first challenge is what I refer to as the persuasion challenge.

The democratic challenge today is, above all, a social and human challenge.

The challenge

We need to reframe the challenge that is facing Africa, from a challenge of despair, which is called poverty reduction, to a challenge of hope.

Global Cardboard Challenge.

The Renminbi Challenge

China s Growth Challenge

The Transparency Challenge

Europe s Immigration Challenge

Africa s Urban Challenge

The Biodiversity Challenge

The Chávez Challenge

Meeting the challenge

The implementation challenge

I was also doing cancer research, immune based therapies for melanoma, to be specific, and in that world I was actually taught to question everything, to challenge all assumptions and hold them to the highest possible scientific standards.

So our first challenge was to find these things, and that was a challenge, indeed.

That nuclear fusion is a source of energy has been known since the invention of the hydrogen bomb. But its control is still a fundamental challenge for research institutes, not some minor technical difficulty that can be easily overcome.

That's my biggest challenge.

A challenge, of course.

This is the challenge.

Governments Self Disruption Challenge

Africa s Structural Transformation Challenge

China s Interest Rate Challenge

Meeting America s Growth Challenge

King Coal s Climate Challenge

Europe s Neo Liberal Challenge

Europe u0027s Obama Challenge

Europe s Uneven Growth Challenge

Haiti s State Building Challenge

The Global Jobs Challenge

The New Mercantilist Challenge

That's a huge challenge.

We accept your challenge.

That makes me to want to refuse to continue this research and research and research.

There's one challenge symbolized at the top, but there's another challenge to science symbolized at the bottom.

The challenge facing all those who are interested in Africa is not the challenge of reducing poverty.

The new negotiations will have one advantage over the earlier efforts, because governments now understand the need for a portfolio of adaptation, mitigation, and research efforts. New research that my colleagues and I undertook for the Copenhagen Consensus Center in Denmark explores the effectiveness of different responses to this global challenge, but it strongly supports the portfolio approach for several reasons.

The new negotiations will have one advantage over the earlier efforts, because governments now understand the need for a portfolio of adaptation, mitigation, and research efforts. New research that my colleagues and I undertook for the Copenhagen Consensus Center in Denmark explores the effectiveness of different responses to this global challenge, but it strongly supports the portfolio approach for several reasons.

My challenge instead is this.

So here's the next challenge.

They challenge what's currently there.

That's the biggest design challenge.

That's our next big challenge.