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Real hot: the Ivanpah solar power plant and others like it use mirrors to produce heat to make steam and drive an electricity turbine. BrightSource Energy

If a solar plant uses natural gas, is it still green?

The massive Ivanpah solar power plant uses natural gas – even more than it expected last year. It’s not ideal, but solar power and natural gas are a powerful, and relatively ‘green,’ combination.
German Theologian Jürgen Moltmann at the graduation of condemned Georgia inmate Kelly Gissendaner. She was executed in September 2015. Emory University

Some find redemption on death row, but few find mercy

Americans’ religious beliefs have made them more tolerant of capital punishment. Some may even see it as holy.
A voter drops off her election ballot at a drop box in Oregon. Richard Clement/REUTERS

Why Asian Americans don’t vote Republican

Asian Americans are the wealthiest, best-educated and fastest-growing segment of voters in the US. They are also increasingly voting Democratic.
A long way to go for $100 billion Green Climate Fund. www.shutterstock.com

The biggest sticking point in Paris climate talks: money

Rich countries are supposed to give $100 billion to developing countries in the upcoming Paris climate talks to deal with climate change. How much has been committed and how will this work?
Four rat tapeworms harvested from a single laboratory rat are shown in a six-well plate. The worms don’t harm the rats. Each worm, between two and three feet long, can produce more than 1,000 eggs per day. William Parker

They might sound gross, but intestinal worms can actually be good for you

The thought of intestinal worms sneaking around our bodies is pretty unpleasant, but some types of worms are beneficial and could help treat inflammatory diseases.