International Women's Day 2019: incredible, underappreciated women of science

For International Women's Day, we bring you the stories of three incredible women: Maria Sibylla Merian, whose science and illustrations gave us an understanding of the lifecycle of insects; Lise Meitner, one of the physicists who first acheived nuclear fission, but missed out on the Nobel Prize; and Margaret Wu, one of many women whose calculations made great contributions to science, but didn't receive the credit they deserved.