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Anthropology

Homo naledi may have dug cave graves and carved marks into cave walls

Proposed discoveries of humanlike activities by these ancient, small-brained hominids have elicited skepticism from some researchers.

Life

Air pollution monitoring may accidentally help scientists track biodiversity

Filters in air monitoring facilities inadvertently capture environmental DNA, which could give scientists a new tool to track local plants and animals.

Math

A ‘vampire einstein’ tile outdoes mathematicians’ latest feat

A newfound shape covers an infinite plane with a pattern that doesn’t repeat and without mirror images of the shape.

Astronomy

Weird black holes may hold secrets of the early universe

Big black holes in little galaxies, rogue black holes and other behemoths could offer clues to cosmic evolution.