Quality of followers, not quantity, determines which tweets will fly

Winners’ work has larger implications for physical systems

To figure out how much we should spend fighting climate change, economists have some questions for you: How much would you be willing to spend now to make your child $100 richer in the future? What about your grandchild in the farther future, or your great-great-great-great-great-grandchild in the very distant future? The health of the planet may hinge on the answers. Most economic analyses of climate change have concluded that we should be spending only small amounts to combat climate change now, ramping up slowly over time. This conclusion mystifies most climate scientists, who argue that i...

A new method picks out promising drug compounds by computer, in much the same way Netflix recommends DVDs to its customers.

A new technique could help make medical records available to researchers without compromising privacy.

The reclusive mathematician who proved the Poincaré conjecture may or may not claim his prize.

New data from the Frankfurt stock exchange show that fleeting financial bubbles behave according to the same mathematical rules as history-making ones. (p. 11)