The size of a child’s vocabulary during the early years helps shape language skills later in life.
Monkey Business Images/www.shutterstock.com
The earliest years of children's lives represent some of the best opportunities to expand their vocabulary and language skills.
The Northern Hemisphere gets its biggest dose of daylight.
Takmeng Wong and the CERES Science Team at NASA Langley Research Center
The tilt of Earth's axis as it orbits the sun results in the seasonal changes.
Older people often take many supplements, including ones purported to help with brain health. A recent study says the supplements do not work.
With fear of a diagnosis of Alzheimer's a constant concern for many seniors, they turn to supplements. A recent study suggests they'd be better off keeping their money.
This term ‘jihad’ can include various forms of nonviolent struggles: for instance, the struggle to become a better person.
AP Photo/Lynne Sladky
Violent radicals are often described as jihadists. A scholar explains what the word means and why those using the word to justify terrorism are often misrepresenting their sources.
The Wheelabrator Waste to Energy Plant in Saugus, Massachusetts, has been burning trash to generate electricity since 1975.
Every year the US burns more than 34 million tons of garbage in incinerators. These plants are major pollution sources, and most are clustered in disadvantaged communities.
Facebook offers lofty ideals for its digital currency.
Facebook claims its new cryptocurrency will bring financial inclusion and opportunity to billions, pushing cash further to the fringes. Is that a good thing?
The world’s newest country?
With the launch of the Libra cryptocurrency, Mark Zuckerberg reveals his dreams of building a new virtual country, perhaps inspired by the Roman Empire.
Staffers at The Village Voice were able to see the riots unfold from the news room.
With major dailies giving a megaphone to the police, the coverage of Stonewall is a reminder of what's lost when alternative media outlets wither away.
Some USAID programs seek to help raise living standards for families like this one in Western Honduras.
Done right, aid fosters greater stability and boosts the economy. That reduces incentives to move away.
Sandra Torres, presidential candidate for the National Unity of Hope, won the first round of presidential election in Guatemala with 25% of the vote, followed by former national prison director Alejandro Giammatei. The two will face-off in the second round of voting in August.
For their next president, Guatemalans must choose between two veteran politicians with shady pasts and alleged ties to organized crime.
All together now?
Major US environmental organizations have promised to diversify their staffs and boards for more than 20 years, but moved slowly. Will workplace scandals make a difference?
Here’s what’s happening in your body if you’re feeling faint.
Most of the time, different parts of your nervous system work in balance. But sometimes things can get out of whack – and that's when you might end up experiencing what medics call syncope.
Black men occupy a disproportionate share of prison cells in the U.S.
Just as with so many other criminal justice policies, pretrial detention disproportionately affects African-American men and women, destabilizing black families in the process.
The U.S.-Mexico border, between San Diego and Calexico, California.
As part of a new 'metering' policy, US officials are turning asylum seekers away at ports of entry along the southern border. Thousands wait, straining the resources of Mexican border towns.
Children line up to enter a tent at the Homestead Temporary Shelter for Unaccompanied Children in Homestead, Fla., Feb. 19, 2019.
AP Photo/Wilfredo Lee
Fort Sill, a military base in Oklahoma, will soon house 1,400 Central American children, the Trump administration says. It's not the first time the US has used army bases to house refugees.
United Nations Security Council members listen to Iranian Deputy Ambassador to the United Nations Eshagh Al-Habib, left, during a meeting on Iran’s compliance with the 2015 nuclear agreement, Dec. 12, 2018, at UN headquarters.
AP Photo/Mary Altaffer
Iran's leaders are threatening to breach a 2015 agreement that froze their country's nuclear program. What is uranium enrichment, and what would it mean for Iran's ability to build nuclear weapons?
Individual givers, including celebrity couple Chrissy Teigen and John Legend, are the main source of charitable support.
Photo by Andy Kropa/Invision/AP
Although far fewer Americans took the charitable deduction on their tax returns, giving stayed fairly steady, according to the annual Giving USA report.
A man reads the newspaper by flashlight during the Northeast Blackout in August 2003.
AP Photo/Joe Kohen
As South American countries recover from a massive blackout, the US isn't immune: The Northeast Blackout of 2003 cut power to 50 million people, and many threats to the electricity grid remain.
Getting a baby to fall asleep can be exhausting.
Marcos Mesa Sam Wordley/Shutterstock.com
Adults are not the only people in the US who have problems with sleep – babies and children suffer from loss of sleep, too. Two pediatric sleep experts explain how you can help your little ones.
Many Virginians back the decades-old moratorium.
AP Photo/Steve Helber
The 6-3 ruling challenges some common political assumptions about conservatives and liberals.