5 things you need to know Monday

1. U.S. foreign-born population nears high

The foreign-born population living in the USA has increased so rapidly that it could break a 125-year-old record within the next decade, according to a Pew Research Center report out Monday. The percentage of people living in the USA who were born outside the country reached 13.7% in 2015 and is projected to hit a record 14.9% in 2025, the report said. The country's previous high of 14.8% was set in 1890, when waves of Irish, Italian, Polish and other immigrants were coming to the USA.

2. Trevor Noah era begins on 'The Daily Show'

South African comedian Trevor Noah, 31, begins his tenure as the third host of The Daily Show Monday, seven weeks after Jon Stewart ended his 16-year run at the helm of the Comedy Central news satire. Noah has promised some changes to the way the show approaches stories. Unlike Stewart, who was easily riled up by hyperactive cable-news outlets, Noah will start out focusing more on people making news than those delivering it. Kevin Hart is his first guest, followed later in the week by New Jersey Gov. Chris Christie and singer Ryan Adams, a sign of the show's continued interest in a blend of politics and entertainment.

3. Trial of guide in Cecil the lion killing due

A professional hunter accused of failing to stop a Minnesota dentist from killing Cecil the lion is due to be tried in a Zimbabwean court Monday. Theo Bronkhorst faces charges of failing to prevent an unlawful hunt at the court in Hwange town. If convicted, he faces up to 15 years in prison. Bronkhorst acted as a guide for dentist Walter Palmer in the July 1 killing of Cecil, a much-loved lion in the Hwange National Park. Palmer has said he believed the hunt was legal. At his last court appearance in August, Bronkhorst branded the case against him "frivolous and wrong," and told reporters he believed he had the right permits, and did not break the law.

4. NASA to announce 'major science finding' about Mars

NASA says it will reveal a "major science finding" from its exploration of Mars on Monday in a press conference at its Washington, D.C. headquarters. Many people are likely already thinking of little green men since NASA's tantalizing news release, "NASA to Announce Mars Mystery Solved." The revelation will more likely deal with water on Mars, since three of the scientists who will be participating in the news conference are among the authors of a paper that asserts images captured by the Mars Reconnaissance Orbiter show the existence of flowing water on the surface of Mars. Such as discovery could have an important impact on NASA's quest to send a manned mission to Mars by the 2030s.

5. World leaders gather for United Nations summit

About 160 world leaders will gather in New York on Monday for the U.N. General Assembly's annual ministerial meeting, to address unrest in the Middle East and other global issues related to peace and international security. While some leaders are arriving specifically for the session that opens Monday, others have already spoken at a separate three-day U.N. summit that ended Sunday and was focused on new U.N. development goals. Addressing a U.N. meeting on sustainable development Sunday, President Obama called on all countries to "step up" efforts to eradicate poverty, and by scheduling a meeting on Tuesday with Cuban counterpart Raul Castro.

And, the essentials:

Weather: There will be rain for much of the country Monday, but it's should be a very pleasant day out West.

Stocks: U.S. stock futures were lower Monday, as investors looked ahead to Chinese and U.S. economic data.

TV tonight: Wondering what to watch tonight? TV critic Robert Bianco looks at Gotham, Castle and The Daily Show with Trevor Noah

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Contributing: Associated Press