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In the Arctic, marine mammals such as belugas and bowhead whales rely on a quiet environment to communicate and forage. But as Arctic sea ice shrinks and shipping traffic increases, vessel disturbance could very likely impact their social behaviours, distribution and long-term survival, warns a new study led by University of Victoria marine biologist Lauren McWhinnie.

Operation IceBridge, NASA’s longest-running airborne mission to monitor polar ice change, concluded this year’s springtime survey of Arctic sea and land ice on May 2. The flights, which began on March 22, covered the western basin of the Arctic Ocean and Greenland’s fastest-changing glaciers.

Billions of years ago, when Earth’s atmosphere reeked of unbreathable gases, microbes evolved in the absence of oxygen. As Earth matured and the nitrogen-oxygen atmosphere formed, these anaerobic, or oxygen-averse, bacteria retreated into the mud of the ocean floor and other environments where they would be safe from oxygen-rich air.

• Cancer patients are at high risk of developing blood clots

• Deep vein thrombosis (DVT) and pulmonary embolism (PE) collectively known as venous thromboembolism (VTE), can cause death and disability

In the weeks before Hurricane Harvey tore across the Gulf of Mexico and plowed into the Texas coast in August 2017, the Gulf's waters were warmer than any time on record, according to a new analysis led by the National Center for Atmospheric Research (NCAR).

These hotter-than-normal conditions supercharged the storm, fueling it with vast stores of moisture, the authors found. When it stalled near the Houston area, the resulting rains broke precipitation records and caused devastating flooding.