The far reaches of Antarctica are no longer visited only by scientists and their support staff. Adventure tourists and curiosity seekers from Europe, North America and beyond now come by the boatful — and they’re bringing some souvenirs from home. Ecologist Steven Chown tells Robert Siegel that visitors unknowingly carry seeds on their clothes and bags. He says they’ve helped spread dozens of invasive plant species on the continent and risk permanently changing Antarctica’s ecology.
Bloomberg News reporter John Lauerman volunteered to have his DNA sequenced by Harvard researchers to demystify the process for the public. What he didn’t expect to uncover was that he possessed two gene variants–one linked to rare blood disorders and the other to a higher risk of Alzheimer’s.
Delays in diagnosing diabetic foot infections can increase the risk of complications. Accordingly, these authors offer a closer look at pertinent principles in the diagnostic workup ranging from insights on the patient history and physical exam to key tips on laboratory studies and imaging studies.
Reviewing the evolution of the Evans calcaneal osteotomy, this author discusses the impact on biomechanics, shares insights from the literature on osteotomy placement and bone graft size, and offers pearls on minimizing the risk of common complications.