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Fentanyl smuggled into US at highest rates everOfficials seized more than 115 million pills containing fentanyl in 2023. The opiate is often mixed with street drugs and linked to overdoses.

Animal communication: Will we ever speak with whales?Marine and robotics researchers used artificial intelligence to detect patterns in sperm whale language, 'whalish'. Will humans learn it one day?

AstraZeneca withdraws COVID-19 vaccine, citing low demandThe company was one of the first to develop a vaccine against SARS-CoV-2. It says withdrawing the jab is unrelated to any side effects it may have caused.

CRISPR gene editing trial treats inherited blindnessResearchers have used a CRISPR-Cas9 tool to restore vision in adults and children with congenital blindness. The researchers said they hoped to soon cure the condition.

Post-tuberculosis lung disease: A patient's storyGlobal TB infections are rising, with some patients suffering lung damage long after they are cured. There are also new strains of drug-resistant TB.

Deadly dam failures: cause, effect and preventionNo dam is flood-proof, as flooding after days of heavy rains in southern Brazil has shown. But dam failure needn't be deadly. Here's what you need to know.

Loneliness is not 'just a first world problem'We know people get lonely — COVID lit a loneliness epidemic. But we don't know enough to help everyone in poorer regions, like sub-Saharan Africa.

COVID: Is Germany prepared for another pandemic?Members of the World Health Organization are starting a new round of negotiations to hammer out a global agreement on pandemics. Has Germany learned the right lessons from the coronavirus pandemic?

Why is Sahara dust blowing into Europe?Dust storms that carry particles from the Sahara into European capitals are more common than you'd think. Here's what you should know about them and how to keep yourself safe.

Hydropower: Can it hold up against climate change?Recent droughts in Colombia and Ecuador have severely hampered energy supplied by hydropower. Can the cheap, low-carbon renewable still thrive in an increasingly hot and dry world?

How do tsunamis form?Tsunamis are rare but can cause mass destruction. Here’s what you need to know about the science behind them.

Malaria: Why aren't case numbers falling?Since 2015, the number of malaria cases worldwide have stalled and ― in some areas, they're even increasing. That's after two decades of falling numbers. What's going on?

How war impacts child developmentAround the world, children are disproportionately bearing the brunt of war. Childhood traumas can permanently change how the brain develops, but the effects often aren’t seen until adulthood.

How microbes could help catch murder suspectsPathologists are hoping to soon be able to use bacterial colonies found at crime scenes to crack hard cases.

Ukraine's Zaporizhzhia: How safe is the nuclear plant?The International Atomic Energy Agency warned attacks on Ukraine's Zaporizhzhia power plant put it — Europe's largest nuclear facility — 'dangerously close to an accident.' It's been a central target in Russia's war.

Nigeria rolls out world's first full shot against meningitisNigeria has rolled out the world's first vaccine against all strains of meningitis. The shot will help ease the burden of disease in Africa's "meningitis belt."

Paleo-Indians changed Latin America — rock art proves itAncient humans moved to America 25,000 years ago. They told stories of their lives and how they changed the environment in stunning cave art.

Weathering: How racism impacts the body on a cellular levelWe know health outcomes frequently differ based on race. The 'Weathering theory' could help explain why, at least in the US.

Nobel Prize-winning physicist Peter Higgs dies, aged 94The professor who proposed the existence of the so-called "God particle" that helped explain how matter formed after the Big Bang, died on Monday following a short illness.

Boson predictor Peter Higgs: A fundamentally modest physicistThey called it the "elusive" God Particle. But they found it in the end — the Higgs boson. Its namesake, British physicist and Nobel Laureate Peter Higgs, lived to see the impact of his science. Higgs died aged 94 years.