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Life

Parks not burdening poor neighbors, study says

New research examines controversy over conservation areas by studying poverty in Costa Rica and Thailand.

Health & Medicine

Immune traits may identify lucky kidney-transplant recipients

Tests find a genetic signature that may delineate people who could drop immune-suppression therapy.

Space

New action film set in solar system’s center

For the first time, solar astronomers have tracked a comet on a collision course with the sun.

Life

Artificial butterfly mixes high, low tech

Model shows importance of wing veins and bobbing flight to keeping swallowtails aloft.