What led up to the FBI's raid of Mar-a-Lago

How the FBI knew what to search for at Mar-a-Lago – and why the Presidential Records Act is an essential tool for the National Archives and future historians

Shannon Bow O'Brien, The University of Texas at Austin College of Liberal Arts

A presidential scholar sets the history and context for the battle over President Trump’s official records – and says it isn’t the first records battle between the government and a former president.

Don’t be too quick to blame social media for America’s polarization – cable news has a bigger effect, study finds

Homa Hosseinmardi, University of Pennsylvania

Studies of online echo chambers don’t paint the full picture of Americans’ political segregation. New research shows that the problem is more Fox News Channel and MSNBC than Facebook and Twitter.

Old age isn’t a modern phenomenon – many people lived long enough to grow old in the olden days, too

Sharon DeWitte, University of South Carolina

Nasty, brutish – but not necessarily short. Here’s how archaeologists know plenty of people didn’t die young.

What is a semiconductor? An electrical engineer explains how these critical electronic components work and how they are made

Trevor Thornton, Arizona State University

Semiconductor chips are electronic devices that store and process information. Today they can contain billions of microscopic switches on a chip smaller than a fingernail.

American Sikhs are targets of bigotry, often due to cultural ignorance

Simran Jeet Singh, Union Theological Seminary

On the 10th anniversary of the Oak Creek massacre, a Sikh scholar writes that there is little understanding of the Sikh faith in the U.S.

China-US tensions: how global trade began splitting into two blocs

ManMohan S Sodhi, City, University of London; Christopher S. Tang, University of California, Los Angeles

Welcome to an era of two parallel worlds in global business.

Do chemicals in sunscreens threaten aquatic life? A new report says a thorough assessment is ‘urgently needed,’ while also calling sunscreens essential protection against skin cancer

Robert Richmond, University of Hawaii; Karen Glanz, University of Pennsylvania

Rising concern about possible environmental damage from the active ingredients in sunscreens could have ripple effects on public health if it causes people to use less of them.

Boosting renewable energy use can happen quickly – and reduce harm to low-income people if done thoughtfully

Erin Baker, UMass Amherst

While a US transition to renewable energy by 2030 is possible, streamlined policies with clear goals and incentives are necessary to get there, says an industrial engineering professor.

Cigarette advertising aggressively targets kids in low- and middle-income countries, a new study finds

Jennifer Brown, Johns Hopkins University

In places around the world that lack restrictions to combat the problem, tobacco companies are using marketing strategies aimed at children, like displaying tobacco products at kids’ eye level.

How does monkeypox spread? An epidemiologist explains why it isn’t an STI and what counts as close contact

The climate bill could short-circuit EV tax credits, making qualifying for them nearly impossible

Who was Ayman al-Zawahri? Where does his death leave al-Qaida and what does it say about US counterterrorism?