Notebook

Ecosystems

Just 1 percent of Amazon’s trees hold half of its carbon

Roughly 1 percent of tree species in the Amazon rainforest account for half of the jungle’s carbon storage.

Neuroscience

Brain on display

In her online videos, Nancy Kanwisher goes where few other neuroscientists go.

Astronomy

Lit-up gas clouds hint at galaxies’ violent pasts

Voorwerpjes, tendrils of gas that orbit galaxies, continue to glow tens of thousands of years after being blasted with ultraviolet radiation.

Environment

Stinkin’ rich

Researchers work out the hidden value of sewage sludge.

Animals

When mom serves herself as dinner

For this spider, extreme motherhood ends with a fatal family feast.