Milo Yiannopoulos speaks during a news conference Tuesday in which he announced his resignation as a senior editor with Breitbart News. Mary Altaffer/AP hide caption

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Mary Altaffer/AP

Anemic patients did not know about their condition during a testosterone trial. Renphoto/Getty Images hide caption

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Researchers Failed To Tell Testosterone Trial Patients They Were Anemic

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Shootings by Customs and Border Patrol agents along the U.S.-Mexico border have been the subject of investigations in the past, but on Tuesday the Supreme Court will hear arguments in a case asking whether families have any right to sue when a shooting occurred on Mexican soil. Russell Contreras/AP hide caption

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In 1852 — three years before Leaves of Grass — Walt Whitman anonymously published a short novel, in six parts, in New York's Sunday Dispatch. FPG/Getty Images hide caption

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Grad Student Discovers A Lost Novel Written By Walt Whitman

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An airstrike targeting an Islamic State group cash and finance distribution center near Mosul, Iraq, as shown in a video released by the U.S. military. AP hide caption

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New Report Finds ISIS Territorial Defeats Are Also Hitting The Group's Wallet

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A World Food Program food distribution site in Bentiu, South Sudan. The U.N. says nearly 5 million people in the country do not have enough food, and in one region people are already dying of starvation. Kate Holt/AP hide caption

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Kate Holt/AP

In South Sudan, People Are Dying Of Hunger As Civil War Continues

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Lt. Gen. H.R. McMaster looks on as President Trump announces him as his national security adviser at Trump's Mar-a-Lago resort in Palm Beach, Fla., on Monday. Nicholas Kamm/AFP/Getty Images hide caption

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New Trump Adviser H.R. McMaster Faces An Old Challenge — Iraq

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Several new studies show mixed results for men taking testosterone supplements. Garo/Phanie/Passage/Getty Images hide caption

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Garo/Phanie/Passage/Getty Images

Does Testosterone Improve Older Men's Health? It Depends

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A message of "Say no to Trump" is projected on Britain's Houses of Parliament the evening before a Monday parliamentary debate took place on Donald Trump's state visit. Nearly 2 million people signed a petition in support of scrapping or downgrading the invitation. Chris J Ratcliffe/Getty Images hide caption

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Adults and children return to St. Louis Jewish Community Center on Jan. 18, in St. Louis after canine units cleared the building. According to St. Louis County Police, someone called the front desk claiming a device was inside. Laurie Skrivan/St. Louis Post-Dispatch via AP hide caption

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Laurie Skrivan/St. Louis Post-Dispatch via AP

Each year thousands of people from around the world tour the Gomantong Cave in Borneo. Although scientists have found a potentially dangerous virus in bats that roost in the cave, no one has ever gotten sick from a trip here. Razis Nasri hide caption

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Razis Nasri

The Next Pandemic Could Be Dripping On Your Head

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President Trump (right) shakes hands with Army Lt. Gen. H.R. McMaster at Trump's Mar-a-Lago estate in Palm Beach, Fla., on Monday. Trump called McMaster "a man of tremendous talent and tremendous experience" as he announced that he would replace Michael Flynn as national security adviser. Susan Walsh/AP hide caption

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Susan Walsh/AP

Relatives of Sergio Hernández sit in Ciudad Juarez at the U.S.-Mexico border, on the second anniversary of his killing in 2012. Jesus Alcazar/AFP/Getty Images hide caption

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Supreme Court To Decide If Mexican Nationals May Sue For Border Shooting

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A happy hour event put on by the Adulting School, where participants learn how to make craft cocktails, at Maine Craft Distilling in Portland, Maine. Other skills taught by the school include changing a flat tire, making deviled eggs and folding sheets. Courtesy of Rachel Weinstein hide caption

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Courtesy of Rachel Weinstein

Defense Secretary Jim Mattis seems to be aiming to reassure U.S. allies while overseas. Ahead of an unannounced visit to Iraq, Mattis rejected President Trump's statements that the U.S. should have seized Iraqi oil after the invasion. Susan Walsh/AP hide caption

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Susan Walsh/AP

Speaking at NATO headquarters Monday, Vice President Pence addressed the ousting of Michael Flynn and attempted to assuage fears that the United States might not uphold its commitments to NATO under President Trump. Emmanuel Dunand/AFP/Getty Images hide caption

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In her blog post, Rigetti describes sexual harassment and systemic sexism at Uber, where she worked for only a year. The post comes at a time when Uber has already been under fire from the #DeleteUber campaign. Eric Risberg/AP hide caption

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Eric Risberg/AP

Zimbabwe's President Robert Mugabe, who turns 93 on Tuesday, speaks at his party's annual conference in December, where he was endorsed as a candidate for the 2018 election. His wife said last week that even if he dies before the election, he should run "as a corpse." Jekesai Njikizana/AFP/Getty Images hide caption

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Jekesai Njikizana/AFP/Getty Images

Nearing 93, Robert Mugabe Shows No Sign Of Stepping Down

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