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Is time travel even possible? An astrophysicist explains the science behind the science fiction

  • Written by Adi Foord, Assistant Professor of Astronomy and Astrophysics, University of Maryland, Baltimore County
imageIf traveling into the past is possible, one way to do it might be sending people through tunnels in space.by raggio5 via Pixabayimage

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.

Will it ever be possible for time travel to occur? – Alana...

Read more: Is time travel even possible? An astrophysicist explains the science behind the science fiction

We studied jail conditions and jail deaths − here's what we found

  • Written by Jessica L. Adler, Associate Professor of History, Florida International University
imageSince Jan. 1, 2023, 10 inmates have died at Fulton County Jail.Joe Raedle/Getty Images

The family of Samuel Lawrence, one of 10 people to die in Georgia’s Fulton County Jail in 2023, is fighting for answers and accountability.

“I got to think about him every day of my life and I don’t know when the pain stops,”...

Read more: We studied jail conditions and jail deaths − here's what we found

As yet another deadline looms, a divided US House stumbles closer to a federal shutdown: 5 essential reads

  • Written by Howard Manly, Race + Equity Editor, The Conversation US
imageU.S. Speaker of the House Mike Johnson arrives for a GOP meeting at the Capitol on Nov. 7, 2023. Drew Angerer/Getty Images

Once again, federal budget negotiations are down to the last minute, and once again, GOP hardliners are in the middle of what might turn into a gridlock.

Current government funding expires on Nov. 17, 2023. While newly elected...

Read more: As yet another deadline looms, a divided US House stumbles closer to a federal shutdown: 5...

Ethiopia's Abiy takes a page from Russia, China in asserting the right to restore historical claim to strategic waters

  • Written by Mahad Darar, Ph.D. Student of Political Science, Colorado State University
imageEthiopian Prime Minister Abiy Ahmed arrives in Beijing on Oct. 16, 2023.Ken Ishii/Getty Images

Ethiopian Prime Minister Abiy Ahmed claimed on Oct. 13, 2023, that his landlocked country has a right to demand maritime access to a Red Sea port from its neighbors in the Horn of Africa – first through diplomatic means, he said, or by force if...

Read more: Ethiopia's Abiy takes a page from Russia, China in asserting the right to restore historical claim...

Mexico will soon elect its first female president – but that landmark masks an uneven march toward women's rights

  • Written by Xavier Medina Vidal, Associate Professor of Political Science and Director of the Center for Mexican American Studies, University of Texas at Arlington
imageClaudia Sheinbaum, the favorite to become Mexico's first female president.AP Photo/Marco Ugarte

Leer en español.

Mexico will elect its first female president in 2024, barring any surprises between now and the June vote.

The looming landmark moment was all but guaranteed in September after the country’s leading parties each nominated a...

Read more: Mexico will soon elect its first female president – but that landmark masks an uneven march toward...

Specialized training programs using sensory augmentation devices could prevent astronauts from getting disoriented in space

  • Written by Vivekanand Pandey Vimal, Research Scientist, Brandeis University
imageAstronauts prepare to leave the International Space Station.NASA via AP

When landing on the surface of the Moon, astronauts can become spatially disoriented, which is when they lose sense of their orientation – they might not be able to tell which way is up. This disorientation can lead to fatal accidents.

Even on Earth, between 1993 and 2013...

Read more: Specialized training programs using sensory augmentation devices could prevent astronauts from...

UN's 'global stocktake' on climate is offering a sober emissions reckoning − but there are also signs of progress

  • Written by Kate Hua-Ke Chi, Junior Research Fellow in Climate Policy, The Fletcher School, Tufts University
imageFossil fuel emissions are still growing in much of the world. Kevin Frayer/Getty Images

When this year’s United Nations Climate Change Conference begins in late November 2023, it will be a moment for course correction. Seven years ago, nearly every country worldwide signed onto the Paris climate agreement. They agreed to goals of limiting...

Read more: UN's 'global stocktake' on climate is offering a sober emissions reckoning − but there are also...

Erdogan's stance on Israel reflects desire to mix politics with realpolitik – and still remain a relevant regional player

  • Written by Ozgur Ozkan, Visiting Scholar at the Fletcher School's Russia and Eurasia Program, Tufts University
imageTurkish President Recep Tayyip Erdogan addresses a pro-Palestinian crowd in Istanbul.Yasin Akgul/AFP via Getty Images)

Turkish President Recep Tayyip Erdogan pulled his ambassador from Israel on Nov. 4, 2023. Less than a month earlier, he was offering diplomatic assistance to calm the situation in the Middle East.

That diplomatic shift is indicative...

Read more: Erdogan's stance on Israel reflects desire to mix politics with realpolitik – and still remain a...

Maine voters don't like their electric utilities, but they balked at paying billions to buy them out

  • Written by Theodore J. Kury, Director of Energy Studies, University of Florida

Frustration with electric utilities is universal today. Whether it’s concerns over high rates, poor service or a combination of both, people are constantly looking for a better answer to the systems that serve them.

In the Nov. 7, 2023, election, voters in Maine had a chance to consider a new model for electricity service that would replace...

Read more: Maine voters don't like their electric utilities, but they balked at paying billions to buy them out

Abortion rights victories show this issue is unlikely to fade in 2024 elections − 3 things to know

  • Written by Nicole Huberfeld, Professor of Health Law and Professor of Law, Boston University
imageAbortion rights supporters celebrate Issue 1 passing in Ohio on Nov. 7, 2023.Megan Jelinger/AFP via Getty Images

Abortion rights advocates won major victories in several state elections on Nov. 7, 2023, signaling that abortion laws are likely to continue to play an important role in the 2024 elections.

In Ohio, the only state where abortion was...

Read more: Abortion rights victories show this issue is unlikely to fade in 2024 elections − 3 things to know

More Articles ...

  1. El idioma provoca una crisis de identidad en los hijos y nietos de inmigrantes latinos
  2. La humildad es la base de una vida virtuosa
  3. What is the rule of proportionality, and is it being observed in the Israeli siege of Gaza?
  4. With government funding running out soon, expect more brinkmanship despite public dismay at political gridlock
  5. People dig deeper to fact-check social media posts when paired with someone who doesn't share their perspective – new research
  6. As national political omens go, Republicans sought middle ground on abortion in Virginia − and still lost the state legislature
  7. Exposing plants to an unusual chemical early on may bolster their growth and help feed the world
  8. Chechnya's boss and Putin’s foot soldier: How Ramzan Kadyrov became such a feared figure in Russia
  9. Cranberries can bounce, float and pollinate themselves: The saucy science of a Thanksgiving classic
  10. Why more food, toiletry and beauty companies are switching to minimalist package designs
  11. How animals get their skin patterns is a matter of physics – new research clarifying how could improve medical diagnostics and synthetic materials
  12. International reaction to Gaza siege has exposed the growing rift between the West and the Global South
  13. We blurred the gender of soccer players and had people rate their performances − with surprising results
  14. In Gaza, the underground war between Israeli troops and Hamas fighters in the tunnels is set to begin
  15. Want a healthier lawn? Instead of bagging fall leaves, take the lazy way out and get a more environmentally friendly yard
  16. Ketamine can rapidly reduce symptoms of PTSD and depression, new study finds
  17. Latter-day Saints lawsuits raise questions over Mormon tithing – can churches just invest funds members believe are for charity?
  18. Fresh water is a hidden challenge − and opportunity − for global supply chains
  19. How effective are public service announcements? Three scholars weigh in
  20. Resources to save 'every creeping thing of the earth' are limited. What would Noah do?
  21. New anti-violence PSA may hit home, but change depends on follow-up and other factors
  22. Your mental dictionary is part of what makes you unique − here's how your brain stores and retrieves words
  23. Your mental dictionary is part of what makes you unique − here's how your brain stores and retrieves words
  24. Engineered 'living materials' could help clean up water pollution one day
  25. Generative AI like ChatGPT could help boost democracy – if it overcomes key hurdles
  26. Generative AI like ChatGPT could help boost democracy – if it overcomes key hurdles
  27. Both Israel and Palestinian supporters accuse the other side of genocide – here's what the term actually means
  28. Both Israel and Palestinian supporters accuse the other side of genocide – here's what the term actually means
  29. Letting low-income Americans buy groceries online in 2020 with SNAP benefits decreased the share of people without enough food – new research
  30. Letting low-income Americans buy groceries online in 2020 with SNAP benefits decreased the share of people without enough food – new research
  31. Sam Bankman-Fried was convicted of fraud following the collapse of the cryptocurrency exchange FTX. Here's what investors need to know
  32. Sam Bankman-Fried was convicted of fraud following the collapse of the cryptocurrency exchange FTX. Here's what investors need to know
  33. Acapulco was built to withstand earthquakes, but not Hurricane Otis' destructive winds – how building codes failed this resort city
  34. Acapulco was built to withstand earthquakes, but not Hurricane Otis' destructive winds – how building codes failed this resort city
  35. Young men in violent parts of Philadelphia, Chicago die from guns at a higher rate than US troops in the heat of battle
  36. Young men in violent parts of Philadelphia, Chicago die from guns at a higher rate than US troops in the heat of battle
  37. Supreme Court considers whether to uphold law that keeps guns out of the hands of domestic abusers
  38. Supreme Court considers whether to uphold law that keeps guns out of the hands of domestic abusers
  39. What's your chronotype? Knowing whether you're a night owl or an early bird could help you do better on tests and avoid scams
  40. What's your chronotype? Knowing whether you're a night owl or an early bird could help you do better on tests and avoid scams
  41. Climate change hits indebted businesses hardest, new research suggests
  42. Climate change hits indebted businesses hardest, new research suggests
  43. As Ohio and other states decide on abortion, anti-abortion activists look to rebrand themselves as not religious
  44. As Ohio and other states decide on abortion, anti-abortion activists look to rebrand themselves as not religious
  45. Why are US politicians so old? And why do they want to stay in office?
  46. Why are US politicians so old? And why do they want to stay in office?
  47. Higher education can be elusive for asylum-seekers and immigrants
  48. Why do our noses get snotty when we are sick? A school nurse explains the powers of mucus
  49. How global warming shakes the Earth: Seismic data show ocean waves gaining strength as the planet warms
  50. How global warming shakes the Earth: Seismic data show ocean waves gaining strength as the planet warms