Prickly pear (Opuntia echios) plants on the island of Santa Cruz in the Galápagos can grow as tall as 12 feet to 20 feet, where they can't be reached by giant tortoises.
By The Scientist Staff | June 24, 2014
FLICKR, DALLAS KRENTZEL
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By Kate Yandell
A mass migration of mobile regulatory elements increased the expression of thousands of genes in the uterus during the evolution of pregnancy.
By Ruth Williams
Scientists have determined the crystal structures of bacterial translocator proteins, but their functions remain unclear.
By Jenny Rood
Charles Townes, Nobel Prize-winning physicist, has passed away at age 99.
View the January 2015 contents.
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