A whole lot of shaking goin' on triggers early hatching in red-eyed tree frogs
Embryos distinguish vibrational differences, hatching early to snake attacks but not to rain .. . With that bite, the embryos start to wiggle frantically. As the snake moves to take another morsel, the embryos rupture their egg capsules, drop into the water, and, as tadpoles, sw...Going To Extremes To Improve Human Health
A new research tool will allow University of Oregon scientists to replicate an extreme range of environmental conditions in their quest to test and understand the human body's response to everyday stresses. . .. "The presence...Mayan stingless bee keeping: Going, going, gone?
Long before Europeans brought honey bees (Apis mellifera) to the Americas, Mayan bee keepers harvested honey from the log nests of stingless bees native to tropical forests. Now, colleagues from the Colegio de la Frontera Sur in Quintana Roo, Mexico and the Smithsonian Tropical Research Institute (STRI) warn of the imminent demise of stingless bee keeping on the Yucatan ?a result of ongoing cultu...The shape of things to come: Morphology database going global
A Florida State University researcher who specializes in the evolutionary history of wasps is now creating a buzz about a new way for scientists to store, share and study plant and animal images. . Fredrik Ronquist, a professor in the School of Computational Sciences, is one of the founders of MorphBank, an international Web database that contains thousands of high-resolution photographs and othe...Watch your step when the going gets rough
Placing your foot accurately is a complicated process. If something moves where you plan to place your foot then you can adjust your step while your foot is swinging through. Experts thought previously that if nothing changed in the path, or in your plans, then the place where your foot will land is fixed before it even leaves the ground. In this case, you would make no use of immediate visual in...When the going gets tough, slime molds start synthesizing
In times of plenty, the uni-cellular slime mold Dictyostelium discoideum leads a solitary life munching on bacteria littering the forest floor. But these simple creatures can perform heroic developmental acts: when the bacterial food supply dries up, Dictyostelium amebas band together with their neighbors and form a multi-cellular tower designed to save the children. . In a forthcoming study in...EGF receptor activation prevents microbes from going more than skin deep
Our skin not only serves as a physical barrier against infection but skin cells themselves can mount an immune response to kill invading microbes by producing antimicrobial polypeptides (AMPs). . As overt infection in the skin is a rare event, researchers have theorized that AMPs must not only help fight infection, but play a role in preventing infection from developing in the first place. In a s...Embryonic stem cells, prized for their astonishing ability to apparently transform into any kind of cell in the body, acquire their identities in part by interacting with their surroundings - even when they are outside of the body in a laboratory dish, University of Florida scientists report. . .. The...Investigators have revealed that coral reef shark populations are in the midst of rapid decline, and that “no-take zones”—reefs where fishing is prohibited—do protect sharks, but only when compliance with no-take regulations is high. The findings, reported by William Robbins and colleagues at James Cook University and its ARC Centre of Excellence for Coral Reef Studies, appear in the December 5th...