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Mauna Kea, a dormant volcano in Hawaii, with an observatory visible on its summit. Native Hawaiians consider the mountain sacred and object to construction on it. Chris Condon/PGA TOUR via Getty Images

Native Americans’ decadeslong struggle for control over sacred lands is making progress

Native Hawaiians see Mauna Kea mountain as sacred. Scientists use its summit for research. A new policy called co-management may help resolve this land conflict and similar ones across the US.
Two women embrace before a Yom Kippur service held outdoors during the COVID-19 pandemic in Los Angeles. Al Seib/Los Angeles Times via Getty Images

Yom Kippur: What does Judaism actually say about forgiveness?

Many religions value forgiveness, but the details of their teachings differ. A psychologist of religion explains how Christian and Jewish attitudes compare.
Maria Elena Paredes, coordinator of the Community Vigilance Committee for the Ashéninka community of Sawawo Hito 40, points to satellite images showing deforestation. Reynaldo Vela/USAID

Indigenous defenders stand between illegal roads and survival of the Amazon rainforest – Brazil’s election could be a turning point

Illegal roads have brought deforestation, fire and other environmental damage to the Amazon. The results of the 2022 presidential runoff could have a major impact for the future.
A woman votes in the controversial referendum in Donetsk, Ukraine on Sept. 27, 2022. Stringer/Anadolu Agency via Getty Images

Russia plans to annex parts of Eastern Ukraine – an Eastern European expert explains 3 key things to know about the regions at stake

While some parts of eastern Ukraine have been under partial Russian control since 2014, other sections continue to fight back. Most residents overall have said they don’t want to be part of Russia.
Women holding up photographs of 22-year-old Mahsa Amini during a demonstration in Arbil, the capital of Iraq’s autonomous Kurdistan region, on Sept. 24, 2022. Safin Hamed/AFP via Getty Images

Iranian women have been rebelling against restrictions since the Islamic Revolution in 1979 – with renewed hope that protests this time will end differently

A scholar of Iranian politics explains how Iranians have organized resistance movements for the past several decades while risking arrest and public flogging.
Around 12 million Americans take out payday loans to help them pay for monthly expenses. andriano_cz/iStock / Getty Images Plus via Getty Images

We tend to underestimate our future expenses – here’s one way to prevent that

Understanding why people underpredict expenses could help them budget more accurately – and even encourage them to save more money.
A variant of Piezo1 may boost tendon strength and, subsequently, athletic ability. Yellow Dog Productions/The Image Bank via Getty Images

Your mighty tendons help you sprint, jump and move – a genetic mutation in one key protein may increase athletic performance

The discovery of the role that the protein Piezo1 plays in touch and body awareness won the 2021 Nobel Prize in physiology or medicine. Piezo1 may also be a significant player in motor function.
This Russian short-range cruise missile, the Iskander-K, can carry nuclear warheads for several hundred miles. Russian Defense Ministry Press Service photo via AP

What are tactical nuclear weapons? An international security expert explains and assesses what they mean for the war in Ukraine

Tactical nuclear weapons were designed to be used on the battlefield rather than for strategic defense, but that doesn’t mean there’s a plausible case for using them.
Some areas wouldn’t see immediate effects, and there could be serious consequences. Buda Mendes/Getty Images

Solar geoengineering might work, but local temperatures could keep rising for years

Injecting reflective particles into the atmosphere won’t immediately cool the entire planet. A new study shows how parts of the US, China and Europe might still see temperatures rising a decade later.
Didymos (bottom right) and its smaller moonlet Dimorphos (center) were the targets of the Double Asteroid Redirection Test. NASA/Johns Hopkins APL

NASA crashed a spacecraft into an asteroid – photos show the last moments of the successful DART mission

The Double Asteroid Redirection Test successfully showed that it is possible to crash a spacecraft into a small asteroid. Whether the approach could save Earth from a future threat remains to be seen.