(Rick Bowmer | AP) Ecologist Nalini Nadkarni is shown in her lab on the University of Utah campus in Salt Lake City on Dec. 3, 2019, holding a Barbie created to look like her when she's climbing into the treetops to study the rainforest canopy. Nadkarni's childhood climbing trees shaped her career and now she's hoping she can get help kids interested in science in an new way: Barbies. Nadkarni has long created her own "treetop Barbies" and has now helped Mattel and National Geographic create a line of dolls with careers in science and conservation.