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Why jellyfish can't rise to the surface

Why jellyfish can't rise to the surface Lisa Lock Scientific Editor Robert Egan Associate Editor Using box jellyfish as an example, researchers from Kiel University show how the physics of density, not behavior or physiology, can prevent animals from reaching the surface even as they actively swim upward. The journey to Everglades National Park began as a routine field trip: scientists from the Nanoelectronics research group at Kiel University (CAU) traveled to the vast wetland region in...

Phys.org 6d ago

Thundering footsteps warn caterpillars of lethal ladybeetle attacks

Thundering footsteps warn caterpillars of lethal ladybeetle attacks Sadie Harley Scientific Editor Robert Egan Associate Editor Diminutive warty birch caterpillars (Falcaria bilineata), less than 1.5mm long, ardently defend their leaf tip homes from invading caterpillars by scraping and pounding the leaf to warn off potential invaders. But how might the day-old caterpillars defend themselves when voracious ladybeetles (known as ladybugs in the US) are on the prowl? Listening for danger on...

Phys.org 6d ago

Parasitic fly 'sacrifices sight' after finding host, study shows

Parasitic fly 'sacrifices sight' after finding host, study shows Sadie Harley Scientific Editor Robert Egan Associate Editor Deer keds—biting flies found across Europe, Asia, Africa and the Americas—use their eyes and flight to locate a host, typically deer, but occasionally humans or other mammals. Once they land, however, they shed their wings permanently and spend the rest of their lives crawling through fur and feeding on blood. A sensory trade off Researchers at Aberystwyth University...

Phys.org 9d ago

Mosquitoes learn to link the smell of DEET with a blood meal, new study finds

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Phys.org 10d ago

A pectin and chitosan film to protect bioactive compounds in foods and therapies

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Phys.org 1d ago

This blood-feeding fly sacrifices its sight after finding a host

This blood-feeding fly sacrifices its sight after finding a host - Date: - June 2, 2026 - Source: - Aberystwyth - Summary: - Deer keds rely on flight and vision to find a host, but everything changes once they land. After shedding their wings forever, these parasites reduce the activity of key vision-related genes by about half. Scientists believe they are effectively trading sharp eyesight for extra energy that can be used for feeding and reproduction.

Science Daily 8d ago

Continuous stirring made early life-like RNA systems more extinction-prone, experiment shows

Continuous stirring made early life-like RNA systems more extinction-prone, experiment shows Andrew Zinin Lead Editor Recent research showed that an artificially constructed self-replicating RNA system modeling primitive life at the origin of life evolved to become more prone to extinction under certain experimental conditions. Modern life is a complex assembly of numerous molecules with diverse functions. However, it is believed that when life first emerged in ancient times, simple...

Phys.org 3d ago

Embryonic tissues can behave like fluids or solids to reshape cell fate signals

Embryonic tissues can behave like fluids or solids to reshape cell fate signals Sadie Harley Scientific Editor Robert Egan Associate Editor Embryonic development is one of the most dynamic biological processes in nature. Cells and tissues organize and reorganize themselves following incredibly precise patterns, while remaining flexible and robust. Scientists are increasingly probing the role the physical properties of embryonic tissues—such as rigidity or stiffness—play in this process.

Phys.org 8d ago

Real-time fish interaction enlarges young guppy brains, while screen time falls short

Real-time fish interaction enlarges young guppy brains, while screen time falls short Sadie Harley Scientific Editor Robert Egan Associate Editor Young guppies who were able to see and interact with live fish developed larger brains than guppies who only saw other fish on a screen. This is shown in a new study from Stockholm University, published in Biology Letters. The findings suggest that live social interaction in real time may be important for brain development.

Phys.org 7d ago

A personalized vaccine for melanoma cut the risk of cancer returning after five years

An experimental vaccine from Moderna shows promise in keeping deadly skin cancer from returning for years, according to new clinical trial results. The research, presented Monday at the American Society of Clinical Oncology’s annual meeting, found that a personalized mRNA vaccine halved the risk of melanoma returning after five years. The results were also published in the Journal of Clinical Oncology.

NBC News 9d ago