Science

This image provided by Pat Branch, shows a meteor over the skies of Green Pond, S.C. Hundreds of people in eight states reported seeing a slow and bright fireball early morning on Thursday, April 4, 2019. Most reports to the American Meteorology Society came from North Carolina and South Carolina. Reports indicate the meteor traveled west to east. (Pat Branch via AP)

This April 3, 2019, photo shows a man wearing shorts running on the coastal trail in Anchorage, Alaska. Much of Anchorage's snow disappeared as Alaska experienced unseasonably warm weather in March. (AP Photo/Mark Thiessen)

In this image taken from video on Thursday, April 4, 2019, and distributed by Roscosmos Space Agency Press Service, Russian cargo ship Souz FG with the Progress MS-11 takes off from the launch pad at Russia's main space facility in Baikonur, Kazakhstan. The cargo ship is carrying fuel, food, water, oxygen and other supplies for the space station, which currently has three Americans, two Russians and one Canadian aboard. (Roscosmos Space Agency Press Service photo via AP)

FILE - This Thursday, Oct. 5, 2017 photo shows Shelley, an adopted cat, at its new home in Philadelphia. A study released on Thursday, April 4, 2019, suggests house cats respond to the sound of their own names. Researchers said it’s the first experimental evidence that cats can distinguish between words people say. (AP Photo/Matt Rourke)

Primatologist Jane Goodall speaks at during a ceremony at City Hall, Wednesday, April 3, 2019, in Los Angeles. Goodall recounted her experiences in Los Angeles over the years, most recently at the 2017 screening of the documentary "Jane" at the Hollywood Bowl that featured a live orchestral performance. (AP Photo/Damian Dovarganes)

FILE - In this May 21, 2008 file photo, honey bees sit on a honeycomb in Germany. The German state of Bavaria is set to accept in large part a plan by environmentalists to save bees and protect biodiversity, averting a referendum on the issue. Leaders of Bavaria’s two governing parties _ both traditional allies of farmers, who have criticized the proposal _ said on Wednesday. April 3, 2019, that they would back the plan in the state legislature. (AP Photo/Heribert Proepper, File)

Water flows down the Oroville Dam spillway in Oroville, Calif., Tuesday, April 2, 2019. California officials opened the flood-control spillway at the nation's tallest dam for the first time since it was rebuilt after it crumbled during heavy rains two years ago.(AP Photo/Rich Pedroncelli)

In this photo made available from the Twitter page of James Heappey MP, demonstrators protest in the public gallery in the House of Commons, London, Monday April 1, 2019. A dozen demonstrators have been arrested after stripping off in Britain's House of Commons to protest climate change. (James Heappey via AP)

FILE - This Monday, Aug. 1, 2016 file photo shows the humanoid robot "Alter" on display at the National Museum of Emerging Science and Innovation in Tokyo. Understanding humor may be one of the last things that separates humans from ever smarter machines, computer scientists and linguists say. (AP Photo/Koji Sasahara)

FILE - This Tuesday, Aug. 15, 2017 file photo shows a model of a Tyrannosaurus rex on display in the New Mexico Museum of Natural History and Science in Albuquerque, N.M. New research released on Friday, March 29, 2019 captures a fossilized snapshot of the day nearly 66 million years ago when an asteroid hit the Earth, fire rained from the sky and the ground shook far worse than any modern earthquake. It was the day that nearly all life on Earth went extinct, including the dinosaurs. (AP Photo/Susan Montoya Bryan)