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3D printing promises more efficient ways to make custom explosives and rocket propellants

  • Written by Monique McClain, Assistant Professor of Mechanical Engineering, Purdue University
image3D printing can be used to build with all kinds of materials – even those that go 'boom.'kynny/iStock via Getty Images

Imagine you’re driving to work on a rainy day, when a distracted, reckless driver hits your car out of nowhere. With a “boom,” an air bag deploys faster than you can blink your eyes to save your life.

That...

Read more: 3D printing promises more efficient ways to make custom explosives and rocket propellants

Carbon offsets bring new investment to Appalachia’s coal fields, but most Appalachians aren’t benefiting

  • Written by Gabe Schwartzman, Assistant Professor of Geography and Sustainability, University of Tennessee
imageFor decades, railroad tracks carried coal from eastern Tennessee to power plants in the eastern U.S.Appalachian Voices, CC BY

Central Appalachia is home to the third-largest concentration of forest carbon offsets traded on the California carbon market. But while these projects bring new investments to Appalachia, most people in Appalachia are not...

Read more: Carbon offsets bring new investment to Appalachia’s coal fields, but most Appalachians aren’t...

Murderous mice attack and kill nesting albatrosses on Midway Atoll − scientists struggle to stop this gruesome new behavior

  • Written by Wieteke Holthuijzen, Ph.D. Candidate in Ecology and Evolutionary Biology, University of Tennessee
imageTheir 'island naïveté' means these seabirds are easy pickings when mice attack.USFWS - Pacific Region/Flickr, CC BY-NC

At the far end of the Northwestern Hawaiian Islands lies Kuaihelani – also known as Midway Atoll – a small set of islands home to the world’s largest albatross colony. Over a million albatrosses return...

Read more: Murderous mice attack and kill nesting albatrosses on Midway Atoll − scientists struggle to stop...

Separate water fountains for Black people still stand in the South – thinly veiled monuments to the long, strange, dehumanizing history of segregation

  • Written by Rodney Coates, Professor of Critical Race and Ethnic Studies, Miami University
imageIn this 1938 image, a Black boy uses a fountain marked 'colored' at a North Carolina county courthouse.Getty Images

No one knows for certain when public facilities like bathrooms and drinking fountains were separated by race.

But starting in the 1890s, shortly after the U.S. Supreme Court decision that legalized “separate but equal” in P...

Read more: Separate water fountains for Black people still stand in the South – thinly veiled monuments to...

How politicians can draw fairer election districts − the same way parents make kids fairly split a piece of cake

  • Written by Benjamin Schneer, Assistant Professor of Public Policy, Harvard Kennedy School
imageUnchecked, politicians are likely to try to grab as much electoral power as they can.Fabrice LEROUGE/ONOKY via Getty Images

Redistricting – the process of determining the boundaries of election districts in which people vote – is a key element of politics that has more of an effect than people might realize. One Republican political...

Read more: How politicians can draw fairer election districts − the same way parents make kids fairly split a...

Nikki Haley insists she can lose South Carolina and still get the nomination – but that would defy history

  • Written by Charles R. Hunt, Assistant Professor of Political Science, Boise State University
imageNikki Haley greets supporters at a campaign stop in Aiken, S.C., on Feb. 5, 2024.Allison Joyce /AFP via Getty Images

Former South Carolina governor and United Nations Ambassador Nikki Haley, a Republican, has lost the first four presidential primary contests, but has vowed to stay in the race for the foreseeable future. Haley seems to be counting...

Read more: Nikki Haley insists she can lose South Carolina and still get the nomination – but that would defy...

How Lula’s big-tent pragmatism won over Brazil again – with a little help from a backlash to Bolsonaro

  • Written by Anthony Pereira, Director of the Kimberly Green Latin American and Caribbean Center, Florida International University
imageBrazilian President Lula greets journalists, in Brasilia, one year after rioters stormed the presidential palace, Congress and Supreme Court buildings.AP Photo/Eraldo Peres

A year is a long time in Brazilian politics.

When Luiz Inácio Lula da Silva assumed office in Brazil for a third time in January 2023, many observers were pessimistic about...

Read more: How Lula’s big-tent pragmatism won over Brazil again – with a little help from a backlash to...

Nearly 2 million Americans are using kratom yearly, but it is banned in multiple states: A pharmacologist explains the controversy

  • Written by C. Michael White, Distinguished Professor of Pharmacy Practice, University of Connecticut
imageKratom products are sold online and at smoke shops and gas stations, like this one in Lone Tree, Colo.Amanda Mascarelli

The herbal substance kratom, derived from the leaves of a Southeast Asian tree, is used by nearly 2 million people in the United States annually. It can be easily purchased at gas stations and convenience stores, smoke shops and...

Read more: Nearly 2 million Americans are using kratom yearly, but it is banned in multiple states: A...

FAFSA website meltdown: How to avoid additional frustration with financial aid applications

  • Written by Dawn Medley, Senior Vice President of Enrollment Management, Drexel University
imageSome colleges are extending the traditional May 1 deadline for students to accept offers.valentinrussanov via Getty Images

When Congress passed the FAFSA Simplification Act in 2020, it was touted as making it easier for more families to access the government funding they need to send their children to college. But as recent events have shown, it...

Read more: FAFSA website meltdown: How to avoid additional frustration with financial aid applications

Why does a leap year have 366 days?

  • Written by Bhagya Subrayan, PhD Student in Physics and Astronomy, Purdue University
imageLeap Day is coming.Marvin Samuel Tolentino Pineda/iStock, via Getty imagesimage

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to curiouskidsus@theconversation.com.

Why does a leap year have 366 days? Does the Earth move slower every four years? – Aarush, age 8, Milpitas,...

Read more: Why does a leap year have 366 days?

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