December The Search for Life | Dec 6, 1999 September Floyd's Watery Wrath | Sep 27, 1999 Shaped by Life in the Womb | Sep 27, 1999 July A Desperate Search at Sea | July 26, 1999 Shoot the Moon | July 26, 1999 Great Lake Effect | July 5, 1999 Playing the Mating Game | July 5, 1999 June From Both Sides Now | June 14, 1999 That Genesis Moment | June 7, 1999 May Secrets of the Cave's Art | May 24, 1999 When Teens Fall Apart | May 10, 1999 Why the Young Kill | May 3, 1999 April The First Americans | April 26, 1999 Boys Need Not Be Boys | April 12, 1999 Thinking Will Make it So | April 5, 1999 March Talking From Hand to Mouth | March 15, 1999 Taming the White Dragon | March 8, 1999 Understanding "Perimenopause" | March 7, 1999 February How Low Can You Go? | Feb 22, 1999 The Real Scandal | Feb 15, 1999 Screening for Genes | Feb 8, 1999 Pluto? Try 'Trans-Neptunian Object.' | Feb 1, 1999 January The Power of Big Ideas | Jan 11, 1999 |