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A new study revealed that sperm navigation, fertilization and embryo development were severely hampered in simulated microgravity. The findings could pose a serious problem for future space colonization.
This week, NASA laid out some ambitious plans for its return to the moon. The space agency's administrator, Jared Isaacman, announced he was canceling a planned space station in lunar orbit to use its parts for a $20 billion permanent base on the moon's surface, while also sending a nuclear-powered spacecraft to Mars.
Whether the plans are realistic, or simple lunacy will likely come into clearer focus next week, as the space agency's Artemis II moon rocket makes its final bid to launch before its April 30 deadline.
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As the war in Iran enters its fifth week with scant signs of a letup, we reported on an alarming finding: The first two weeks of the war had already released a staggering amount of carbon dioxide, and the biggest source of the emissions was in the destruction of buildings that will need to be cleared and rebuilt.
The war has drained the global carbon budget faster than 84 countries — the lowest carbon emitters — combined. The aftershocks of the war are expected to have an even bigger climate impact than the fighting itself, as countries seek to buffer against fuel and fertilizer shocks caused by Iran's blockade of the Strait of Hormuz.
Genetical material is everywhere around us — in the soil, water and air — and it leaves behind invisible fingerprints for entire ecosystems. Tracing it could enable scientists to detect species, map food webs and chart biodiversity without tracking a single organism.
If you're looking for something a little longer to read over the weekend, here are some of the best analyses, crosswords and opinion pieces published this week.
This photo, snapped by NASA's Terra satellite in February, shows a bright plume of swirling marine mud that was whipped up off the coast of Florida following an Arctic blast that brought severe winter weather to large parts of the U.S. earlier this year.
NASA's Artemis II rocket stands poised at Launch Pad 39B at NASA's Kennedy Space Center in Florida. The 322-foot-tall (98 meters) Space Launch System and Orion crew capsule stack is ready to launch the mission's four-astronaut crew on a 10-day flight around the moon and back as soon as April 1.
Science in motion
Sperm whale birth recorded up close for the first time
Rare video shows female sperm whales working together during a birth - YouTube
Researchers have filmed a sperm whale giving birth while being assisted by 10 other females in her social unit. It's the first time an event of this kind has ever been seen in non-primates.
The birth, captured by airborne drones in July 2023, took place over the course of an hour, during which time females surrounded the mother and newborn in a protective circle, taking turns to raise the calf to the surface — giving it time for its flukes to unfurl and acquire its own natural buoyancy control.
Sperm whale social groups are matriarchies, with life-long bonds formed between mothers, daughters, grandmothers and unrelated females. The males, meanwhile, primarily roam the oceans alone, creating one of the most extreme geographical separations between the sexes in nature.
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.
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