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Twenty-two of the 24 Democratic 2020 presidential candidates. Reuters

Why are there so many candidates for president?

The number of candidates in presidential primaries has skyrocketed since the 2016 election. Divisions inside political parties and easy ways for candidates to raise money are among the reasons why.
The crests (bright) and troughs (dark) of waves spread out after they were produced. The picture applies to both light and sound waves. Titima Ongkantong

A new type of laser uses sound waves to help to detect weak forces

Most people are familiar with lasers. But what about a laser made with sound rather than light? A couple of physicists have now created one that they plan to use for measuring imperceivable forces.
Students hug after a ceremony at Tufts University May 3. The ceremony celebrated 58 students who are the first in their family to receive a college degree. Anna Miller/Tufts University

This commencement speech had nothing but questions

At a special commencement ceremony for first-generation college graduates, a dean gave a speech made up of nothing but questions.
The internet is growing, but old information continues to disappear daily. wk1003mike/shutterstock.com

Your internet data is rotting

MySpace users were recently shocked to learn that the company lost 50 million user files. It’s a harsh lesson in not leaving your intellectual property unprotected on the information superhighway.
A Syrian archeologist holds an artifact that was transported to Damascus for safe-keeping during the Syrian Civil War. AP Photo/Hassan Ammar

We’re just beginning to grasp the toll of the Islamic State’s archaeological looting in Syria

According to a new study, a small portion of a site can yield thousands of objects, adding up to millions of dollars.
A school of juvenile bocaccio in the midwaters of Platform Gilda, Santa Barbara Channel, Calif. Scott Gietler

Retired oil rigs off the California coast could find new lives as artificial reefs

Californians love their coast and strongly oppose offshore drilling. Will they support converting old oil rigs to artificial reefs – a policy that benefits both marine life and oil companies?
Seattle Times publisher Frank Blethen testifies in February at a public hearing at the Washington legislature against limiting legislative branch disclosure. AP/Ted S. Warren

Secrecy versus sunshine: Efforts to hide government records never stop

Government produces millions of pages of records every day: studies, reports, memos, emails, budgets and more. These reports belong to the public, but increasingly, lawmakers are trying to hide them.
Doctors care for a trauma patient. While survival rates for trauma victims have improved, if you live to leave the hospital, you’re still at risk of dying. MonkeyBusinessImages/Shutterstock.com

How traumatic injury has become a health care crisis

Trauma results in 41 million emergency department visits a year and hundreds of thousands of deaths. May is National Trauma Awareness month, and two experts explain why it’s time to pay attention.
Climate change could further stress species such as Atlantic cod that already are threatened by overfishing. Vladimir Wrangel/Shutterstock

How is climate change affecting fishes? There are clues inside their ears

Tiny calcified formations inside fishes’ ears can be used to trace a fish’s life history – and potentially, how climate change has affected its growth and development.