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The wildfire that roared through Fort McMurray, Alberta, Canada, last May has been called the worst fire in Canadian history. Its devastation is staggering: More than 100,000 residents and nearby workers were evacuated at different stages of the fire, and more than 2,200 square miles of land and 2,400 structures burned in two provinces: Alberta and its eastern neighbor, Saskatchewan. With the fire only 70 percent contained to date, its economic impact is yet to be tallied.

After years of intense — and often controversial — restoration efforts, biologists are finally reporting some good news for the beleaguered California condor: More chicks are surviving in the wild, and the birds are becoming increasingly independent and expanding their range.

Earlier this year, the U.S. Fish and Wildlife Service announced what it called a milestone for the California condor: More chicks had hatched and fledged in the wild during 2015 than the number of condors that had died. In late March, Steve Kirkland, the agency’s condor field coordinator, reported that two more chicks had fledged in 2015 in Baja California, but had only just been discovered, bringing the total in the wild to 270.

It was perhaps the most promising news about the condor in decades.

El número de especies que pueden existir en la Tierra depende de cómo cambia el medio ambiente, según un nuevo estudio dirigido por la Universidad de Southampton. Mediante el análisis de los registros fósiles de criaturas acuáticas microscópicas llamados foraminíferos planctónicos, cuyos restos fósiles se asemejan a palomitas de maíz miniaturizadas y datan de millones de años

A few months ago, the Centers for Disease Control and Prevention published a startling map that showed the parts of the U.S. that could harbor mosquitoes capable of carrying Zika. The map made it look like a vast swath of the country was at risk for Zika, including New England and the Upper Midwest. Well, not quite. On Thursday, CDC scientists published another mosquito map for the U.S. And it paints a very different picture.

Miles de personas se manifestaron esta semana para pedir más protección para una querida población de orcas altamente en peligro de extinción, también conocida como las orcas residentes meridionales que viven en el noroeste del Pacífico. Gracias a las excursiones de observación de ballenas y organizaciones como la Red de la orca y el Centro de Investigación de Ballenas, que mantiene un censo oficial de su población, hemos tenido la oportunidad de verlas en su vida cotidiana.