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Science says humans are the driving force behind climate change. But we have to go back centuries to get an idea of how we got to where we are today.In the 1600s, people started using coal for fuel more often than wood. It was more widely available and produced more energy.The industrial revolution was a turning point. That’s when America started burning more fossil fuels for energy.By the early 1800s, people were using high-pressure boilers to fuel coal-powered engines. That included trains, steamboats, and ships.The first theory of human-caused climate change came about in 1838. A physicist proposed that water vapor and carbon dioxide could trap heat in the earth's atmosphere.Then, in 1876, a Russian scientist observed that - since the industrial revolution - Siberian glaciers started melting.Scientists say much of that water ended up in the ocean and raised sea levels.Sea levels are between five and eight inches higher today than they were in 1900.Some climate change critics argue temperatures are going down in some places.Scientists say that's somewhat true but that, overall, earth's temperatures are on the rise.Critics also argue humans aren't behind climate change.Scientists say there's a direct correlation between human carbon emissions and rising temperatures.Some scientists believe our "right now" culture will make the crisis worse. They say things like same-day delivery and frequent air travel could all put more carbon into the atmosphere. That the carbon traps heat that then warms the earth. 1539

Some veterans are finding relief from the effects of post-traumatic stress disorder by choosing to take up some unconventional treatments that include beekeeping or farming.Vince Ylitalo knows that many people would find hundreds of buzzing bees around him to be frightening. But it’s proven to be an effective treatment for his PTSD. It’s part of structured therapy.“I'm in this program to help me get out of the thought process of all those problems that I have. It helps me think about something completely different. I don't even think about my pain anymore. I'm just thinking about the bees,” Ylitalo said in an interview with the Associated Press.He’s taking part in a free, nine-month beekeeping course. About 80 percent of the participants in the Heroes to Hives program have a disability.Other veterans are participating in different programs to help treat PTSD.Army veteran Andrew Larsen turned to farming in rural Florida.The 949

Spending 340 days aboard the International Space Station between 2015 and 2016 caused changes in astronaut Scott Kelly's body, from his weight down to his genes, according to the results of the NASA Twins Study, released Thursday.The majority of changes that occurred in Kelly's body, compared with his identical brother, Mark, on Earth, returned to normal once he came back from the space station. The study results suggest that human health can be "mostly sustained" for a year in space, the researchers said.On a call with reporters Thursday, Mark thanked Scott for his service to the country and commitment to science by spending a year in space without knowing how it would affect him."I got all the glory, and you got all the work," Scott said, chiding his twin."And I got people coming to my house for tubes of blood," Mark replied in reference to the scientific samples taken during Scott's mission; Scott was collecting the same samples from himself to send back to researchers on Earth.The results show "the resilience and robustness of the human body," said Steven Platts, deputy chief scientist for NASA's Human Research Program, which coordinated the study.Coincidentally, the results are being released just in time for the 58th anniversary of the first manned spaceflight by Soviet cosmonaut Yuri Gagarin.But the much-anticipated study reveals areas that may require countermeasures or safeguards when preparing for longer space missions or missions to deep space, like Mars.The molecular, physiological and behavioral changes were divided into low-, mid-level and high-risk groups. Scott's change in body mass and microbiome were considered low-risk. Shifts in collagen regulation and blood vessel fluid management were mid-level, and genomic instability was regarded as potentially high-risk."When we go into space and experience microgravity and travel at speeds like 17,500 miles an hour, our bodies adapt and continue to function and, by and large, function extremely well," Platts said.The study, which includes the work of 84 scientists who made up 10 teams from 12 universities in eight states, all studying different aspects of the human body in space, was published Thursday in the journal 2227

Senators are done with many of the quaint rules that are making them miserable during President Donald Trump's impeachment trial. Many are pacing the chamber, walking out during arguments, napping and openly scoffing. Bans on that behavior are designed to keep their attention on the grave and rare business of deciding whether to remove a president from office. But they're getting little sleep, and they've heard the story of Trump's pressure on Ukraine before. The ban on cell phones on the Senate floor is one rule they haven't apparently flouted, though they often appear to be leaving the floor for a moment with their devices.Democrats appeal for GOP help to convict 'corrupt' TrumpHouse Democrats have wrapped up a day of arguments in President Donald Trump's impeachment trial, appealing to skeptical Republican senators to join them in voting to oust Trump from office to “protect our democracy.” Trump's lawyers are sitting by, waiting their turn. The president is blasting the proceedings, threatening jokingly to face off with the Democrats by coming to “sit right in the front row and stare at their corrupt faces.” The challenge before the House managers is clear: Democrats have 24 hours over three days to prosecute the charges against Trump, trying to win over not just fidgety senators but the American public.Crime required for impeachment? Not so, say legal expertsThe defense in President Donald Trump's Senate impeachment trial may sound very similar to the defense in the first impeachment case in American history. Back in 1868, a lawyer for President Andrew Johnson argued that Johnson couldn't be removed from office because Johnson hadn't committed a crime. Today, one of Trump's lawyers, Alan Dershowitz, is planning to argue at Trump's trial that impeachment requires “criminal-like conduct." But legal scholars dispute the idea that the Founding Fathers ever intended for impeachable offenses to require proof of a crime. Historians also are skeptical about crediting this argument with securing Johnson's narrow acquittal. 2066

Senate Republicans are drafting a stopgap spending bill to extend the funding deadline for approximately 25% of the federal government until February 8, according to three sources.The decision to move forward on the short-term plan hasn't been finalized, the sources said. There are still senators who are urging GOP leaders to negotiate for a broader deal.A final decision likely won't be made until at least Wednesday, the sources said, and President Donald Trump still needs to sign off on any path forward.Senate Democratic leader Chuck Schumer of New York told reporters earlier Tuesday that Democrats would "seriously consider" supporting a short-term spending measure.The proposal comes following a stark shift in the White House's stance going into negotiations. Trump initially refused to budge from his demand for billion in border wall funding, a nonstarter for Democrats that prompted the possibility of a partial government shutdown.A compromise seemed unlikely after a televised meeting in the Oval Office last week, when Trump clashed with House Minority Leader Nancy Pelosi, a California Democrat, and Senate Minority Leader Schumer on the need for wall funding. The President ultimately took ownership of a possible shutdown."I'll tell you what, I am proud to shut down the government for border security, Chuck," Trump told the top Senate Democrat. "So I will take the mantle. I will be the one to shut it down. I'm not going to blame you for it."But White House press secretary Sarah Sanders suggested Tuesday that the White House could agree to a compromise bill to keep the government open, because "we have other ways that we can get to that billion.""We will work with Congress if they will make sure we get a bill passed that provides not just the funding for the wall, but there's a piece of legislation that's been pushed around that Democrats actually voted 26-5 out of committee that provides roughly billion for border security including .6 billion for the wall," she told Fox News. "That's something that we would be able to support as long as we can couple that with other funding resources."Schumer had previously proposed such a bill to avert a shutdown, but retracted it last week because it would not have passed the House, partially due to House Democrats' opposition to .6 billion in border security. 2363

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