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News
A label-free imaging technique can distinguish biological pigments
1+ week, 1+ day ago (224+ words) lead image But THG microscopy lacks chemically-specific information for use in certain biomedical applications. Following up on previous studies of THG responses in hemoglobin, Dees et al. imaged red blood cells and yellow pigmented cells called xanthophores in zebrafish larvae,…...
How well can marine mammals filter out noise?
1+ week, 2+ day ago (253+ words) lead image Anyone who has struggled to make out a conversation in a loud bar or restaurant has experienced auditory masking — a phenomenon in which the presence of one sound makes it harder to hear another. Understanding the toll of…...
Bringing order to seal pup movements
2+ week, 5+ day ago (309+ words) lead image Baby seals rarely stray far from their homes. But they do explore, gradually, the area around which they were born, roaming further and further until they are ready to be on their own. For Annika Betken and Alexander…...
A strange metal lurking in a mollusk at the bottom of the ocean
1+ mon, 2+ week ago (318+ words) lead image Mollusks are one of Earth’s most varied phyla, comprising nearly 100 thousand species. Many of these species have only barely been studied, and much about them remains unknown. Take Aegires albus, for instance: This species of sea slug lives…...
How much light comes from a firefly?
2+ mon, 2+ week ago (140+ words) lead image In the middle of a forest, surrounded by a flickering insect constellation, your first thought is likely, “This feels magical,” followed by questions like, “Why do fireflies glimmer, anyway?” or “How does bioluminescence work?” “Real fireflies look much…...
Bird feathers inspire aerodynamic flaps
3+ mon, 2+ week ago (172+ words) lead image “Because the flaps are passive and flexible, they may not need motors or active control,” said author Young Dal Jeong. “They can move naturally with the flow, similar to feathers on bird wings.” The researchers conducted three sets…...
A bug’s life: Dead ants and snail shells in ant trash - AIP.ORG
4+ mon, 23+ hour ago (21+ words) Comparing the mechanics of snail shells and ant mandibles provides clues about why there are shell fragments in ants’ garbage heaps....
Swimming through non-Newtonian fluids
4+ mon, 1+ week ago (287+ words) lead image Conventional rheometric devices, such as cone-and-plate rotational rheometers, need to extract a fluid from its source to measure it, a process that can alter some fluid properties or can be impossible. But what if researchers could bring a…...
Marine seismic vibrators reduce risk to marine mammals for underwater oil and gas exploration
5+ mon, 2+ day ago (202+ words) lead image Austin et al. analyzed the potential effects of marine vibroseis on marine mammals in a shallow, near-shore region of Cook Inlet, Alaska. The pilot study examined the first commercial use of underwater seismic vibroseis, measuring a low-frequency sweep…...
The flight of the sea butterfly
5+ mon, 1+ week ago (273+ words) lead image Sea butterflies — free-swimming mollusks that belong to the order Pteropoda — use their unique winged structures for movement, propelling themselves around in the water by “flapping.” Even with detailed optical imaging, the hydrodynamics surrounding these pteropods are hard to…...