We celebrated Earth Day this week, and the science news was filled with troubling implications for the pale blue dot we call home.

Topping the list was a new study that suggests the collapse of a vital Atlantic Ocean current is much closer than we thought. The Atlantic Meridional Overturning Circulation recycles vast quantities of carbon and keeps Western Europe and the U.S. East Coast warm. Yet many studies suggest the current's collapse is imminent, and the new research used fresh data and a novel analysis to find that we could be underestimating just how close the threat is. One team of scientists has even suggested the extreme measure of building a giant dam across the Bering strait to fend off the current's collapse.

In other concerning developments, new satellite images show that oil spills are wreaking untold ecological havoc in the Persian Gulf and El Niño could be here by May.

Scientists invent artificial neurons

Scientists invent artificial neurons that 'talk' to real brain cells, paving way to better brain implants

Tiny, artificial neurons that can communicate with real brain cells could lay the groundwork for more advanced computers and computer-brain interfaces. A new study we reported on this week used inks laced with flakes of semiconductors and conductors printed onto a polymer substrate to create neurons.

These artificial neurons produced electrical spiking patterns that closely resembled those in human brains, while the flexibility of the polymer enabled a complex and evolving artificial neural architecture to take shape.

When placed next to mouse neurons in the lab, the artificial neurons caused the real neurons to fire at the same pace — strongly suggesting that the two could communicate the same signals. Although a lot of work remains, the finding could be the first step toward creating computers with human-like neural structures.

Discover more health news

—Gene therapy improves hearing in 90% of patients with inherited deafness in largest trial of its kind

—Diagnostic dilemma: A teen's classic diabetes symptoms didn't improve with treatment — revealing she also had a much rarer syndrome

—'A landmark moment for the field': FDA approves first-ever gene therapy for inherited deafness

Life's Little Mysteries

Why are some constellations visible for only part of the year?

Why are some stars constant fixtures in the night sky and others shift in and out of view with the passing of the seasons? It has to do with Earth's own characteristic wobble.

—If you enjoyed this, sign up for our Life's Little Mysteries newsletter

Mummy found with the "Iliad"

Egyptian mummy has part of the 'Iliad' in its abdomen, archaeologists discover

Ever had a book you just couldn't put down? A Roman-era mummy in Egypt may have you beat, having been found with part of Homer's epic poem the "Iliad" inside its abdomen.

The mummy dates to between 30 B.C. and A.D. 641, when the Romans controlled Egypt, and was found within a cemetery in the modern-day town of Al-Bahnasa, which was known as Oxyrhynchus in ancient times.

Little is known about the ancient bookworm, aside from him being an adult man, but he was discovered at the same cemetery as dozens of other mummies with golden tongues, which ancient Egyptians believed granted them the power to speak with the gods in the afterlife.

Discover more archaeology news

—Neanderthal toddlers grew faster than modern humans, probably because of the harsh environment they evolved in

—DNA study of nearly 200 Indigenous genomes reveals unknown Asian 'ghost' population contributed to American ancestry

—700-year-old mummy from Bolivia contains earliest confirmed evidence of strep throat bacteria in the Americas

Also in science news this week

—NASA shuts off another Voyager 1 instrument as humanity's most distant spacecraft prepares for risky 'Big Bang' maneuver to save power

—Bruce the parrot is missing his upper beak —‬ but that hasn't stopped him from becoming an undefeated jousting champion

—'Kraken' octopus that lived at the time of the dinosaurs was a 62-foot-long apex predator of the ocean

—Artemis II heat shield aced its blistering reentry, ghostly underwater photo reveals

—Artemis moon landing could face long delay while NASA waits for next-generation spacesuits

—Advanced AI-powered table-tennis-playing robot can match up to the professionals — watch it in action

Science long read

'Brain-eating' amoebas are nearly always fatal. New treatments may change that.

Brain-eating amoebas are comparatively rare infections, yet they are almost always fatal. Thriving in warm fresh water, they charge into the body like "a bull in a china shop," destroying brain tissue on a massive scale. As climate change heats waters, possibly expanding these microorganisms' range, Live Science reported on the race to create groundbreaking treatments to kill them.

Something for the weekend

If you're looking for things to keep you busy over the weekend, here are some of the best interviews and quizzes published this week.

—'The chances of you living 50 years are very small': Theoretical physicist explains why humanity likely won't survive to see all the forces unified [Interview]

—'Strong, undeniable public examples of something positive': Astronaut Chris Hadfield on why Artemis II hit him hard, and why we need to send a guitar to the moon [Interview]

—Earth quiz: What do you know about our planet's most amazing features? [Quiz]

Science news in pictures

'What are the odds': Superbright comet and exploding fireball meteor form near-perfect X over European castle

Photographers Petr Horálek and Josef Kujal captured this extraordinary cosmic coincidence on April 18 in the skies over the ruins of the 15th-century Kunětická Hora Castle in the Czech Republic, with the "Great Comet of 2026" contender crossing paths with a fireball meteor in the sky to form a giant X. Don't tell Elon Musk.

Follow Live Science on social media

Want more science news? Follow our Live Science WhatsApp Channel for the latest discoveries as they happen. It's the best way to get our expert reporting on the go, but if you don't use WhatsApp we're also on Facebook, X (formerly Twitter), Flipboard, Instagram, TikTok, Bluesky and LinkedIn.

Ben Turner is a U.K. based writer and editor at Live Science. He covers physics and astronomy, tech and climate change. He graduated from University College London with a degree in particle physics before training as a journalist. When he's not writing, Ben enjoys reading literature, playing the guitar and embarrassing himself with chess.