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Infectious diseases are no longer the major killers in the U.S. that they once were, but they still surprise us.

According to a report published Tuesday in JAMA, the journal of the American Medical Association, deaths from infectious disease accounted for 5.4 percent of deaths from 1980 to 2014.

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A new report out of the University of Connecticut is raising concern about hospital-acquired infections from respirators.

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Why are some people more susceptible to addiction than others? How does genetic makeup influence a person’s chances of becoming an addict? This hour, we find out how researchers at Yale University and The Jackson Laboratory are working to better understand the science of addiction. 

A large study has produced reassuring evidence about a drug that millions of people use to alleviate pain from arthritis and other ailments.

The study found no evidence that the drug Celebrex, or generically, celecoxib, poses any greater risk for causing heart attacks and strokes than two other widely used pain relievers.

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It has been 100 years since the Easter Rising in Ireland -- when Irish nationalists rebelled against the British government in Dublin and other parts of the country in 1916. The rebellion eventually led to Irish independence and civil war.

A large space rock came fairly close to Earth on Sunday night. Astronomers knew it wasn't going to hit Earth, thanks in part to a new tool NASA is developing for detecting potentially dangerous asteroids.

When scientists recently announced that they had discovered a new planet orbiting our closest stellar neighbor, Proxima Centuri, they also released an artist's conception of the planet.

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Since March, several infants in Connecticut have died at home daycares – resulting in police investigations and heightened concern among parents.

This hour, we talk about child care – many of us rely on it, how do we keep it safe?

Scientists in Michigan have found a new dwarf planet in our solar system.

It's about 330 miles across and some 8.5 billion miles from the sun. It takes 1,100 years to complete one orbit.

But one of the most interesting things about the new object, known for the time being as 2014 UZ224, is the way astronomers found it.

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Politics plays a role in all sorts of things in life: dating partners, how we think about the economy, and, according to Eitan Hersh, the choices doctors make.

This is the way the Rosetta ends: not with a bang, but with a slow-motion crash.

The historic spacecraft has transformed scientists' understanding of comets over the past two years, as it orbited the 67P/Churyumov-Gerasimenko comet and sent a stream of images and data back to Earth.

Now scientists have steered it into the comet for a "Grand Finale" of data-collection, and Rosetta has lost contact with Earth forever.

It has been a common belief that low-emissions vehicles, like hybrids and electric cars, are more expensive than other choices. But a new study finds that when operating and maintenance costs are included in a vehicle's price, cleaner cars may actually be a better bet.

The cars and trucks we drive are responsible for about a fifth of greenhouse gas emissions in this country. That's why Jessika Trancik, an energy scientist at the Massachusetts Institute of Technology, decided it was time to take a closer look at vehicle emissions.

Centers for Disease Control and Prevention

Teen pregnancy rates in the U.S. have reached historic lows, according to the latest data from the Centers for Disease Control and Prevention, declining more than 40 percent from 2006 to 2014.

Newly released FBI data show the number of murders in the U.S. rose nearly 11 percent last year and violent crime increased by nearly 4 percent, but crime researchers said homicides and other violence still remain at low rates compared with a crime wave from 20 years ago.

The Commercial Fisheries Research Foundation is kicking off a new project to collect data on black sea bass, a species that has moved north in search of cooler water.

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This year marks an important milestone in our nation's history -- 35 years since the discovery of HIV/AIDS. This hour, we look back to see how far we've come in understanding, treating, and destigmatizing HIV/AIDS in America. 

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This hour, we look at the impact of climate change on New England's native plant and animal species. We talk with scientists and science journalists, and we hear from you. Have you noticed anything different about the flora and fauna in your backyard? And what can historical records -- like the observations of naturalist Henry David Thoreau -- teach us about our changing environment? 

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Colin has a "pet" raccoon that visits his porch. The raccoon will press her tiny paw up against the outstretched palm of Colin's significant other, which rests on the indoor side of the glass. Eventually, the raccoon gets a bit of food because "she" is too cute to resist. The pleased raccoon now visits on a regular basis. Colin fears this cannot end well.

A more than 160-year-old Arctic mystery has come to resolution: The HMS Terror, a vessel from a doomed Royal Navy exploration to chart an unnavigated portion of the Northwest Passage, has been found, Aleta Brooke, operations manager for the Arctic Research Foundation said.

The Guardian, which first reported the story, said the vessel is in "perfect condition." The paper reports:

Five states are voting this fall on whether marijuana should be legal, like alcohol, for recreational use. That has sparked questions about what we know — and don't know — about marijuana's effect on the brain.

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Connecticut’'s medical marijuana program is proving to be a success. The program has been up and running since 2014 with more than 12,000 patients and a growing list of certified doctors, according to the Department of Consumer Protection. 

Newly released government data paint a sobering picture of safety on the nation's roads and highways.

In 2015, the number of people who died in auto accidents reached 35,092, says the National Highway Traffic Safety Administration, a 7.2% increase over 2014. The last time there was such a large single-year increase was back in 1966 when Lyndon Johnson was president.

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State officials are preparing to respond if there are any signs the Zika virus is being transmitted in Connecticut. Experts from several state agencies met Wednesday to put together a plan to combat the spread of the disease.

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Why are some people more susceptible to addiction than others? How does genetic makeup influence a person’s chances of becoming an addict? This hour, we find out how researchers at Yale University and The Jackson Laboratory are working to better understand the science of addiction. 

The Obama administration has denied a bid by two Democratic governors to reconsider how it treats marijuana under federal drug control laws, keeping the drug for now, at least, in the most restrictive category for U.S. law enforcement purposes.

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