This is scientific Americans 62nd science. I'm David Biello at the COP21 climate talks in Paris.

We are unstoppable. Another world is possible. On December 9th, the day when protesters finally made an appearance.

A new coalition emerged here at the climate talks in Paris.

A group of some 90 nations, including the U.S.

unites rich and poor, big and small.

The goal is to ensure a strong global deal to combat climate change.

Such an agreement would include recognition that the world must aim as soon

as possible to hold global warming to 1.5 degrees Celsius. A long-term low-carbon future,

five-year updated action plans that recognize the developing climate reality, and aid

to those countries that did little to cause climate change, but are most at risk from it.

All of those elements are in the latest draft of the Paris Agreement, but most points are still up for debate.

U.S. lead negotiator Todd Stern called this new coalition exactly what the climate talks need to avoid a deal that fails to take strong action to

combat climate change. As Secretary of State John Kerry put it here today,

Ladies and gentlemen, the situation demands and this moment

that we do not leave Paris without an ambitious, inclusive,

and durable global climate agreement.

First and foremost, we need an agreement that is as ambitious as possible.

We don't lose anything for being ambitious.

Except perhaps sleep during what is sure to be a hectic and possibly boisterous next few days.

We are unstoppable.

Another world is possible. From the COP21 climate talks in Paris,

for Scientific American 60 Second Science,

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