Alice Lin Seamans

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New Study Says Ancient Humans Hunted Big Mammals To Extinction

Over the past 125,000 years, the average size of mammals on the Earth has shrunk. And humans are to blame.<p>That's the conclusion of a new study of the fossil record by paleo-biologist Felisa Smith of the University of New Mexico.<p>Smith studied fossils going back 65 million years, when dinosaurs died …

Paleontology

Trillions Upon Trillions of Viruses Fall From the Sky Each Day

High in the Sierra Nevada mountains of Spain, an international team of researchers set out four buckets to gather a shower of viruses falling from the sky.<p>Scientists have surmised there is a stream of viruses circling the planet, above the planet’s weather systems but below the level of airline …

Biology

Students are being prepared for jobs that no longer exist. Here's how that could change.

As automation disrupts the labor market and good middle-class jobs disappear, schools are struggling to equip students with future-proof skills.<p><i>Editor’s note: This article is the first in a series entitled Map to the Middle Class, which is being jointly published by NBCNews.com and The Hechinger</i> …

Education

Center Of The Milky Way Has Thousands Of Black Holes, Study Shows

The supermassive black hole lurking at the center of our galaxy appears to have a lot of company, according to a new study that suggests the monster is surrounded by about 10,000 other black holes.<p>For decades, scientists have thought that black holes should sink to the center of galaxies and …

Black Holes

Scientists Have Discovered a New Organ in the Human Body. What is the Interstitium?

It’s not a second stomach or a mini-brain. But scientists have discovered an important new organ that may play a critical role in how many tissues …

Baton Rouge police officers won’t be charged in fatal shooting of Alton Sterling

Officials in Louisiana on Tuesday declined to charge two Baton Rouge police officers in the fatal shooting of Alton Sterling, one of a series of shootings that prompted nationwide protests in 2016.<p>Sterling, 37, was shot and killed after officers Blane Salamoni and Howie Lake II responded to a call …

Law Enforcement

French supermarket siege: gendarme dies after taking place of hostage

Number of victims rises to four with death in hospital of Lt Col Arnaud Beltrame following attacks in Carcassonne, southern France<p>A gendarme who exchanged himself for a hostage during the French supermarket siege has died, bringing the number of victims to four. Police shot dead the attacker after …

Extremism

These Men Helped Create Cambridge Analytica. Here Is Their New, Very Similar Startup.

Chris Wylie, a data scientist whose work was at the center of a massive Facebook controversy, said publicly that he helped create “Steve Bannon’s psychological warfare tool.” Two of his associates who also helped build that tool have been quietly building another company to analyze and influence …

Cambridge Analytica

Peru’s President Offers Resignation Over Vote-Buying Scandal

LIMA, Peru — After less than two years in office, Peru’s embattled president, Pedro Pablo Kuczynski, offered his resignation on Wednesday, a day after the release of videos that showed key allies trying to buy the support of opposition lawmakers.<p>Mr. Kuczynski had spent months fighting off attempts …

Human Rights

Male birth control pill one step closer to reality, researchers say

<b>(CNN) —</b> For decades, birth control pills have exclusively been used by women. But a male birth control pill that is both safe and effective may be on the horizon, according to a new study.<p>The results of the study were presented Sunday at the annual Endocrine Society meeting in Chicago. The …

Biomedicine

Shooting At Maryland High School Injures 2 Students; Gunman Dead

<b>Updated at 5:05 p.m. ET</b><p>Two students were injured when another student opened fire at Great Mills High School in St. Mary's County, Md., according to the local sheriff. The shooter, identified by the sheriff as 17-year-old Austin Wyatt Rollins, was confirmed dead after being taken to a hospital.<p>"A …

High School

Teen shoots girl in Maryland school, killed in confrontation

GREAT MILLS, Md. (AP) — A teenager armed with a handgun shot and critically wounded a girl inside a Maryland school on Tuesday and the shooter was killed when a school resource officer confronted him moments after the gunfire erupted. A third student was in good condition after he was shot.<p>The …

Guns

There’s Never Been a Native American Congresswoman. That Could Change in 2018.

ALBUQUERQUE — When Deb Haaland was a child, she would rise early on this state’s sun-beaten tribal land, sling a water jar around her waist and climb the mesa overlooking her pueblo.<p>It was as high as she ever thought she would go.<p>Now, she is among a historic number of Native American women running …

Native Americans

Students demand action on gun violence with nationwide walkout

PARKLAND, Fla. — They solemnly spilled onto the high school football field, holding signs protesting gun violence and wearing shirts that read "March for our lives." They waved at a crowd of onlookers who had gathered to show support.<p>Exactly one month after 17 people were killed at Marjory Stoneman …

High School

YouTube Hiring for Some Positions Excluded White and Asian Men, Lawsuit Says

A former employee alleges tech firm set quotas for hiring minorities<p>YouTube last year stopped hiring white and Asian males for technical positions because they didn’t help the world’s largest video site achieve its goals for improving diversity, according to a civil lawsuit filed by a former …

Human Resources

Researchers Identify Five Different Types of Diabetes, Not Just Type 1 and Type 2

For many years, diabetes cases have largely been classified as either type 1 or type 2. But a new study suggests that there may actually be five …

Scientists detect signal from ‘cosmic dawn,’ when stars first lit up the universe

For the first time, scientists have detected a signal from “cosmic dawn” — the moment when the universe's earliest stars emerged.<p>The signal, reported Wednesday in the journal Nature, is little more than a blip in the radio echo of that ancient era, as difficult to detect as the wingbeat of a …

Black Holes

Japanese scientists invent floating 'firefly' light

TOKYO (Reuters) - Japanese engineering researchers say they have created a tiny electronic light the size of a firefly which rides waves of ultrasound, and could eventually figure in applications ranging from moving displays to projection mapping.<p>Named Luciola for its resemblance to the firefly, …

Demonstration

Brazil is taking an 'extreme measure' to confront crime in Rio — the first time it's done so since the country's dictatorship fell

Brazilian President Michel Temer signed a decree on Friday giving the military control of public-security duties in Rio de Janeiro state until the end of the year, amid spiraling violence in the state and the city of the same name.<p>The military has been deployed to Rio several times in recent years, …

Brazil

The students at Florida’s Douglas High are amazing communicators. That could save lives.

Telegenic and media-savvy is one way to describe David Hogg, a lean and dark-haired senior at Florida’s Marjory Stoneman Douglas High School.<p>But maybe a better way is this: Change agent.<p>And what could be more sorely needed than a change agent right now? Because the mass shootings in America have …

Gun Control

Pope Francis wowed the world but, five years on, is in troubled waters

He entered office on a wave of energy but, as discontent grows over his attitude to abuse scandals, Francis faces opposition on all sides<p>Chatham House is one of the most important foreign affairs thinktanks in the UK. But on Wednesday its focus will not be a president, or an organisation like the …

Obama Administration

Big Mexico quake cuts power and damages homes; two dead in crash

MEXICO CITY (Reuters) - A prolonged 7.2 magnitude quake that rocked Mexico on Friday left nearly a million homes and businesses without power in the capital and south but the only reported deaths came when a military helicopter crashed after surveying the aftermath.<p>At least 50 homes suffered damage …

Natural Disasters

More than 50 years of U.S. mass shootings: The victims, sites, killers and weapons

<i>The Santa Fe High School shooting is a developing story and details will be updated.</i><p>The places change, the numbers change, but the choice of weapon remains the same. In the United States, people who want to kill a lot of other people most often do it with guns.<p>Related<p>The number of U.S. mass …

Guns

Concussions Can Be Detected With New Blood Test Approved by F.D.A.

The Food and Drug Administration on Wednesday approved a long-awaited blood test to detect concussions in people and more quickly identify those with possible brain injuries.<p>The test, called the Banyan Brain Trauma Indicator, is also expected to reduce the number of people exposed to radiation …

Medicine

Couple sells all possessions for sailboat, sinks 2 days into trip

A couple’s plan for a better life has been sunk.<p>Nikki Walsh, 24, and boyfriend Tanner Broadwell, 26, decided nearly a year ago that they were tired of working.<p>“How can we live our lives when we’re working most of the day and you have to pay so much just to live?” Walsh, who booked time-share tours …

Tampa Bay

Asteroid set for 'close' 43,300 mile flight past Earth on Friday

<b>An asteroid up to 40m in size and only discovered five days ago, is due to skim past the Earth on Friday.</b><p>Asteroid 2018 CB will pass by at just less than one-fifth the distance between the Earth and the Moon.<p>It was first spotted by the Catalina Sky Survey in Tucson, Arizona, a Nasa-funded project to …

Asteroids

Five major psychiatric disorders have overlapping patterns of genetic activity, new study shows

<i>This post has been updated.</i><p>Certain patterns of genetic activity appear to be common among five distinct psychiatric disorders — autism, schizophrenia, bipolar disorder, depression and alcoholism — according to a new study. The paper, appearing in the journal Science, was released …

Mental Health

Polar Bears Really Are Starving Because of Global Warming, Study Shows

New science sheds more light on recent controversy over how much the large carnivores are being impacted by melting sea ice.<p>Millions have seen the heart-wrenching video of a polar bear clinging to life, its white hair limply covering its thin, bony frame. Shot by Paul Nicklen and Cristina …

Want easy-to-set-up gadget security? It’s not going to be cheap

Security executives are pushing out easy cybersecurity solutions for the average person. The hard part will be getting people to pay for it.<p>The proliferation of connected gadgets in the home means there's a lot more for the average person to worry about.<p>It's not just your phone and computer that …

Smart Homes

Lunar showstopper: Super blue blood moon awes and wows

CAPE CANAVERAL, Fla. (AP) — The moon put on a rare cosmic show Wednesday: a red blue moon, super big and super bright.<p>It's the first time in 35 years a blue moon has synced up with a supermoon and a total lunar eclipse, or blood moon because of its red hue.<p>Hawaii and Alaska had the best seats, …

Super Blue Blood Moon