October is heading to close, and we’ve got you covered with the latest in STEM news for the month. We’re keeping things a little creepy to celebrate Halloween. From ghostly stars to creepy critters that help solve crimes, here are some of our top picks.
A new report recently came to light about the rapid evolution of a lizard species native to Florida in response to pressure from an invading Cuban species. Scientists have observed and documented this lizard species evolve in the relatively short span of 15 years and 20 generations.
After initial contact with the invasive species, native lizards, called Carolina anoles, began perching higher in trees. From one generation to another, their feet evolved to become better at gripping the thinner, smoother branches found in the higher parts of the trees. Now, their toe pads are larger and there are more sticky scales on their feet.
Researchers believe that the changes are a response to competition for food and living space. It’s also noted that both lizard species have been documented to eat the hatchlings of the other species. Thus, the ability to scale trees at a quicker pace may be the difference between getting to safety and becoming a meal. Read more here.
New science suggests that if you’re a leatherback sea turtle, staying on the plump size may make it easier to get around the ocean. Researchers at the University of Wisconsin-Madison, Florida Atlantic University (FAU), and the National Oceanic and Atmospheric Administration (NOAA) have found that long and lean sea turtles are not as efficient swimmers as the ones that are more robust in size. To come to these conclusions, scientists measured the forces that act on a swimming animal and the energy that is expended by the animal to move through the water. After using their measurements and recreating an environment with virtual sea turtles and experimenting with different parameters, they found that rounder sea turtles are able to cover more ground while using up the same amount of energy as their skinnier counterparts. Read more here.
We’re getting into the spirit of Halloween with this creepy video. Dead or alive, a body plays host to all sorts of organisms. There are innumerable types of flora that are naturally found on a person’s skin, as well as inside stomachs, noses, mouths and other body parts. But when a dead body begins to decompose, it also becomes a breeding ground for certain types of bugs that act as decomposers to return the body’s nutrients back to the earth. Knowledge of the life cycles of these bugs can help forensic scientists during crime scene investigation. Watch more here.
Miniature human stomachs can now be grown in Petri dishes. By bathing stem cells in a concoction of chemicals that boost growth, scientists have managed to create clumps of gastric tissue the size of a pin head. Like normal human stomachs, the lab-grown stomach globs contain cells that are able to make mucus and pump hormones. Scientists are hoping to use the tissue to further study gastric diseases, such as stomach cancer. Read more here.
NASA’s Hubble Telescope has picked up the faint glow of stars that were ejected from ancient galaxies that were gravitationally wrenched apart several billion years ago. The “ghost lights” from the dead galaxies are no longer bound to any one galaxy. Instead, the stars drift freely between the nearly 500 galaxies in the cluster known as “Pandora’s Cluster”. By observing the light from the stray stars, scientists have gathered enough evidence to believe that as many as six galaxies were torn apart over the course of 6 billion years. Read more here.
A team of scientists and engineers at the University of California recently created a new nanoparticle-based material that has the capacity to convert absorb and convert to heat more than 90% of the sunlight that it captures. It is also able to withstand temperatures of more than 700 degrees Celsius, and has the ability to withstand many years of outdoor exposure to air and humidity. In comparison, current solar absorbers have significantly shorter life spans, and are unable to function at higher temperatures. The type of energy that the material is harvesting is called concentrated solar power (CSP). The sun is still an emerging source of power, but it has a great deal of potential within the alternative energy market. CSP currently produces approximately 3.5 gigawatts worth of power at power plants around the globe, or the equivalent to the energy needed to power more than 2 million homes. Read more here.
Okay STEM lovers, what stories did you enjoy? What stories did we miss this month? We want to hear your thoughts!