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From top to bottom: normal, NDE1 mutant, NDEL1 mutant, and NDE1 + NDEL1 double mutant cells. Each panel represents 30-minute intervals. 

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BPA can disrupt painted turtles' brain development could be a population health concern

Cheryl Rosenfeld and her team found that BPA can induce behavioral changes in turtles, reprogramming male turtle brains to show behavior common in females. Researchers worry this could lead to population declines in painted turtles.Bisphenol A (BPA) is a chemical used in many consumer products including water bottles, metal food storage products and certain resins. Often, aquatic environments such as rivers and streams become...

'Cyclops' beetles hint at solution to 'chicken-and-egg' problem in novel trait evolution

Heads of horned and cyclopic beetles of the genus <em>Onthophagus</em> are shown. After knocking out the gene otd1, the cyclopic beetle (right) lost the horn but gained a pair of small compound eyes in the center of the head.Beetles with cyclops eyes have given Indiana University scientists insight into how new traits may evolve through the recruitment of existing genes -- even if these genes are already carrying...

In the ocean, clever camouflage beats super sight

Squinting won't help you spot the fish in this photo. These snub-nosed darts blend seamlessly into their watery surroundings with help from their silvery reflective skin. Researchers have long assumed that squid, shrimp and other ocean animals could see through this disguise, thanks to an ability to detect a property of light -- called polarization -- that humans can't see. But a new study finds that not even polarization vision helps animals spot silvery fish from afar.In a matchup of animal superpowers, a clever form of camouflage might beat super sight -- at least in the ocean.

Simple new test could improve diagnosis of tuberculosis in developing nations

In a new diagnostic test, a green glow highlights live TB cells against a field of other debris in a saliva sample.In developing nations, the current test to diagnose tuberculosis (TB) is error-prone, complicated and time-consuming. Furthermore, patients in these resource-limited areas can't easily travel back to a clinic at a...

Scientists have conducted a mathematical analysis of a rare cavernicolous crustacean

Remipede <I>Speleonectes tulumensis</I>, a rare crustacean found in saline waters of caves.A scientific collaboration of researchers from the Lomonosov Moscow State University and the Smithsonian Institution has discovered previously unknown regularities of arthropod limbs based on studies of the remipede Speleonectes...

Recording analog memories in human cells

MIT biological engineers have devised a way to record complex histories in the DNA of human cells, allowing them to retrieve "memories" of past events, such as inflammation, by sequencing...

Nobel laureate, new technologies show how cancer cells protect chromosomes from decay

Protective telomeres are augmented by freely diffusing telomerase.As the rope of a chromosomes replicates, it frays at the ends. No problem: A chromosome's ends have extra twine so that fraying doesn't reach into the body of the...

Urbanization affects diets of butterflies: NUS study

Mr. Anuj Jain from the NUS Department of Biological Sciences conducting studies on butterflies.A study led by researchers from the National University of Singapore (NUS) revealed that most tropical butterflies feed on a variety of flower types, but those that are 'picky' about...

New techniques boost understanding of how fish fins became fingers

Markers of the wrists and digits in the limb of a mouse (left) are present in fish and demarcate the fin rays (right). The wrist and digits of tetrapods are the cellular and genetic equivalents of the fin rays of fish.One of the great transformations required for the descendants of fish to become creatures that could walk on land was the replacement of long, elegant fin rays by fingers and...

Researchers discover the hidden potential of disordered proteins

Structure of the Androgen Receptor. NTD: N-terminal domain; DBD: DNA binding domain; LBD: Ligand binding domain. Numbers indicate the first and last amino acids of the protein, and the domain limits.Prostate cancer, Alzheimer's, Parkinson's...these three diseases are associated with proteins that share a common feature, namely disordered regions that have no apparent rigid three-dimensional structure. In spite of the potential...

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UNH scientists unravel genetic ancestry of cultivated strawberry

UNH scientists constructed a linkage map of the seven chromosomes of the diploid <em>Fragaria iinumae</em>, which allows them to fill in a piece of the genetic puzzle about the eight sets of chromosomes of the cultivated strawberry.Scientists from the University of New Hampshire have unlocked a major genetic mystery of one of the ancestors of cultivated strawberry. A genetic analysis conducted by New Hampshire Agricultural Experiment...

Rising temperatures could accelerate radiation induced DNA effects in marine mussels

Increased sea temperatures could dramatically enhance and accelerate radiation-induced DNA effects in marine invertebrates, a new study suggests.

Stem cell therapy heals injured mouse brain

Giving a compound called 3K3A-APC to mice with stroke-induced brain damage dramatically increased the production of new neurons (labeled in red) from neural stem cells implanted next to the injured area.Scientists and clinicians have long dreamed of helping the injured brain repair itself by creating new neurons, and an innovative NIH-funded study published today in Nature Medicine may bring this...

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Single-celled fungi multiply, alien-like, by fusing cells in host

Microsporidia cause diarrhea, an illness called microsporidiosis and even death in immune-compromised individuals.

Logged rainforests can be an 'ark' for mammals, extensive study shows

Orangutan caught by motion-sensitive cameras.Research reveals that large areas of 'degraded' forest in Southeast Asia can play an important role in conserving mammal diversity.

Scripps Florida study finds 'missing evolutionary link' of widely used natural drug source

Authors of the new paper included (left to right) Ben Shen, Jeffrey Rudolf and Liao-Bin Dong of The Scripps Research Institute.A well-known family of natural compounds, called "terpenoids," have a curious evolutionary origin. In particular, one question relevant to future drug discovery has puzzled scientists: exactly how does Nature make...

Neural stem cells in adult mice also vulnerable to Zika

This visual abstract shows the findings of Li et al., that peripheral ZIKV exposure in a mouse model can infect adult neural stem cells in the brain, leading to cell death and reduced proliferation. Thus, in addition to impacting fetal development, ZIKV infection may also have negative effects on the adult brain.Zika infection kills off neural stem cells in adult mice bred to be vulnerable to the virus, researchers at the Rockefeller University and the La Jolla Institute for Allergy and...

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Most island vertebrate extinctions could be averted, concludes new study

The critically endangered Ricord's iguana, native to Cabritos Island, Dominican Republic, is one of the most threatened lizards in the world. Island Conservation is working with the DR's Ministry of Environment and Natural Resources and SOH Conservation to remove invasive species from Cabritos Island to prevent the extinction of this rare reptile.Eight of every ten species extinctions has occurred on islands, and invasive mammals are the leading reason for those losses. Currently, 40 percent of species at risk of global extinction...

Long-term exposure to female scents changes courtship behavior in male mice

A specific kind of neuron found only in male mice and that detects a pheromone in female urine has been identified by researchers at Washington University School of Medicine in St. Louis. But the sex difference is not hard-wired. By manipulating the mice's living conditions and exposing male mice to female scents for long periods of time, the scientists showed that males lost these neurons and, with them, their interest in courting females.Few things are as interesting to a male mouse as the scent of a female. Pheromones released by females draw the attention of male mice and trigger courtship and mating...

Poaching patrol: New ranger methods decrease illegal activities

Ecologists from the University of York have tested a new method to detect and decrease wildlife poaching, using data to better predict where illegal activities occur in protected areas.

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Big fish -- and their pee -- are key parts of coral reef ecosystems

The Almaco jack is a large predator fish, pictured here in the Caribbean.Coral reefs wouldn't be the same without their beautiful fish.

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