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Protests by indigenous peoples against a planned gas pipeline have shut down rail traffic across eastern Canada, causing chaos for shippers and travelers.

The first Hitchhiker's Guide to the Galaxy book was published in October 1979. Fans are looking back at how the series has endured in popularity and why it's still relevant.

A Lancet medical journal report finds that human-caused climate change is worsening human health in just about every measurable way. It calls for more urgent action from world leaders.

The 26-year-old climate activist from Kenya founded the Green Generation Initiative, a group that helps young people become environmentally conscious through growing trees.

Arctic communities have long been plagued by soot that drives snow melt and respiratory disease. Now, humans are making their mark in Antarctica.

Authorities in Pakistan and India have been evacuating people from coastal areas ahead of the storm. Schools and government buildings have been converted into shelters.

Many large businesses accept climate change. That creates another challenge: a split with many Republican allies in Congress who are still fighting the debate over climate science.

Hillary Clinton and Donald Trump had strong Super Tuesday showings, but their rivals didn't let up. Bernie Sanders won 4 states. Ted Cruz captured three. And, Marco Rubio won the Minnesota caucuses.

It's March Mammal Madness, a bracket with real animals facing off in fictional battles. Hundreds of science classes are playing in schools around the country.

Seeking to cut greenhouse gas emissions dramatically by 2030, regulators approved a plan that offers incentives for truck and bus fleets to go green and for utilities to use more renewable energy.