AP Top Science News at 2:20 p.m. EDT

US envoy says climate summit can yield 'enormous progress'

Alaska's vanishing salmon push Yukon River tribes to brink

European-Japanese space mission gets 1st glimpse of Mercury

Endangered status proposed for Nevada flower at lithium mine

Scientists decipher Marie Antoinette's redacted love notes

EXPLAINER: Flood insurance revamp aims for fairer rates

Erupting Spanish volcano turns 'more aggressive': officials

NASA's Nelson's: Astronauts no longer exclusive to white men

Europe, Japan probes to get 1st look at destination Mercury

EXPLAINER: What Kilauea’s history tells us about its future