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The scientific models that ecologists and conservation biologists rely on to determine which species and habitats to protect lack critical information to help them make effective decisions, according to a new study.

While the eastern United States and large parts of Europe suffered through a long, cold winter, temperatures were nothing short of balmy over much of the Arctic. The North Pole experienced above-freezing weather in February, temperatures over the Arctic Ocean were as much as 13 degrees Fahrenheit above average from December into early March, and sea ice melted back to its second-lowest annual maximum extent since the satellite record began in 1979.

Climate change is a one of the biggest challenges facing humanity. The Paris Agreement, adopted in December 2015, became the second legally binding climate agreement after the Kyoto Protocol, and coordinates global efforts to combat climate change.

A Mayo Clinic study finds no evidence that children given anesthesia before their third birthdays have lower IQs than those who did not have it. A more complex picture emerges among people who had anesthesia several times as small children: Although their intelligence is comparable, they score modestly lower on tests measuring fine motor skills, and their parents are more likely to report behavioral and learning problems. The findings are published in Anesthesiology.

The Tibetan Plateau has experienced more rapid climate warming than the global average, coupled with greater interannual variation in precipitation over the past 50 years. How will such dramatic climate change influence the structure and function of alpine grasslands? Interest in this topic is high because of its importance to the sustainable development of animal husbandry and the livelihood of Tibetan inhabitants.