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Blue-green algae on western Lake Erie on September 26, 2017. The border between the United States and Canada runs down the centre of the lake. Landsat 8 image. Source: http://spaceref.com/onorbit/orbital-view-of-algal-blooms-in-lake-erie.html The natural  history of Lake Okeechobee, at 730 square miles the largest lake in Florida, is intimately entwined with that of the surrounding Everglades. Before the… Continue Reading

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The present-day Gila River in the Gila Box Riparian National Conservation Area in southeast Arizona.  Both nature and nurture affect human obesity. For some people, and for some populations, the genetic tendency to become obese is not fulfilled because of their environment, the circumstances of their lives. But when those circumstances change, the genetic potential… Continue Reading