This month, we are announcing five new challenges that collectively provide some perspective on the scale and scope of our ambitions. We started Grand Challenges almost 15 years ago to encourage people with big ideas to concentrate on the problems that prevent the poorest from thriving. We invite you to apply to one of the challenges and join us.

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Today we announce 51 Grand Challenges Explorations awardees from 16 countries reflecting lessons learned from the past 15 years.

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Dr. Sara Lustigman's Grand Challenges Explorations grant involving the development of infective larvae of parasitic filarial worms through to adulthood using three-dimensional tissue modles.

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Great Ideas Come from Everywhere, 28 Grand Challenges Explorations projects from 11 countries are part of today's Gates Foundation's announcement.

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Let’s face it: nobody really enjoys conferences. In theory, they give spread-out communities a chance to come together and engage in fierce debates and trenchant learning about important issues. But practice doesn’t always match the theory. Last week in London at the Grand Challenges Annual Meeting, however, it did.

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