At a Glance A USGS biologist spotted a small algae bloom on Florida's Lake Okeechobee this week.Some scientists are concerned that it might mean a repeat of last year's disastrous algae bloom that closed beaches along Florida's coast.But others say it's too early to tell. Scientists are concerned that a small, blue-green algae bloom spotted this weekin Florida's Lake Okeechobee could mean a repeat of last summer's emergency that killedmarine life and closed beaches along the state'sAtlantic coast. Barry Rosen,...

Daffodils bloom in front of Park Place Church of God in Anderson, Indiana, on Saturday, March 4, 2017. (Don Knight/The Herald-Bulletin via AP) An exceptionally early spring was welcomed by many winter-weary Americans, but the balmy weather does not bode well for how extensively and quickly human-induced greenhouse gas is affecting climate change, a new study says. In February, more than 11,700 daily high records were set across much of the United States,and scientists working on a quick attribution study...

A bleached staghorn coral sits on the Great Barrier Reef in March 2017. (Arc Centre of Excellence for Coral Reef Studies/Bette Willis) At a Glance A massive bleaching event in 2016 has already killed large sections of the Great Barrier Reef.Stress from the bleaching is causing the reef's resilience to wane.A fourth bleaching event is under way, which may kill off corals that are still recovering. Large portions of Australia'sGreat Barrier Reef have died because of another year of coral...