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SPOTLIGHT

1. SCIENCE

How researchers unearthed the saga of a tiny fern that may have saved the planet

Only 55 million years ago, our planet had no polar ice caps; in fact, it nearly became a steamy, runaway greenhouse world, with CO2 levels exceeding 2,500 ppm. Then, all of a sudden, something intervened, causing a shift. Atmospheric carbon dioxide began to drop, steadily generating today's world, with ice caps at both poles. But why did this happen? And better yet, could whatever triggered this drastic switch be used to temper today's climate?

2. ADVOCACY

Former Reagan official predicts Republican skeptics will be 'mummed' by climate change

Senior GOP statesman George Shultz urged Republicans on Friday to be proactive on climate change, calling it an "obvious risk" to the economy and national security. The former secretary of State for President Reagan says that rising temperatures could be addressed through an inexpensive "insurance policy," similar to Reagan's support for restrictions on gases that degraded the ozone layer in the 1970s and '80s.

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