SCIENCE MAGAZINE: The latest issue features ‘Windows Into The Past’ – Fossilized shark denticles provide a view of preexploitation abundance.

Planned satellite constellations risk runaway debris

Modeling suggests infamous “Kessler syndrome” would make the swarms unsustainable

Researchers struggle to improve nonopioid pain drugs

Studies probe the limits of new sodium channel blockers

Physicists find strong evidence for elusive ‘glueball’

Long-sought particle, made of force-carrying gluons, represents a new type of matter

Fight over Colorado River water threatens ecosystems

After a record-low snowpack, federal authorities canceled dam releases for managing fish and sandbars

Tau can wreak havoc in brain cells’ energy factories

Study of mitochondria suggests new treatment strategy for Alzheimer’s and other diseases