Octopus camouflage is incredibly hard work

Octopuses have the remarkable ability to change their appearance in the blink of an eye – assuming new skin coloration and patterns for camouflage or communication. A new study in the journal PNAS has explored how much energy this takes, and it turns out transforming themselves is a workout harder than you’d ever get at the gym. Dr. Kirt Onthank is a professor of Biology at Walla Walla University and known as The Octopus Guy on social media.

Bigger isn’t better when it comes to dog brains

Dog bodies and brain sizes vary enormously, but a new study comparing dogs’ cognitive abilities and personalities with brain size reveals some surprises. The research, led by evolutionary biologist Ana Balcarcel, found that the biggest brains relative to their body sizes belong to the small, anxious, excitable companion dogs, while the trainable, obedient working breeds are not gifted when it comes to volume of brain tissue. The work was published in the journal Biology Letters.

This universe is too sparse, this one’s too dense, and this one? Well, it’ll do

Our universe might seem like it’s perfectly tuned for life, but when it comes to the role dark energy plays in the emergence of life, it turns out that our universe might not be so special after all. A new study that simulated the development of hypothetical universes with different amounts of dark energy suggests the optimal amount of dark energy to enable the evolution of life is only one-tenth of the density in our universe. Daniele Sorini, a postdoctoral researcher at Durham University and his team published their work in Monthly Notices of the Royal Astronomical Society.

Why a smack on the lips might have come from a snack on a tick

Lip mashing is an oddity in the animal kingdom. Other than humans, few species have adopted the custom of pressing lips together as a signal of affection. A new theory for why humans kiss suggests it emerged from primate grooming practices, and the lip-lock has its roots in us slurping up parasites we’ve combed from a companion's fur. Dr. Adriano Lameira, an evolutionary psychologist at the University of Warwick published his new hypothesis in the journal Evolutionary Anthropology.

Taking out our brains’ trash may be key to maintaining a healthy brain

Some scientists think it's possible that a host of neurological disorders, from Alzheimer's to Parkinson’s, could be connected to problems with the way the brain rids itself of metabolic waste. A couple of recent studies in Nature are helping this longstanding puzzle about how this waste removal system works and what we might be able to do about it when it doesn’t.

A study published in Nature describes how synchronized electrical waves help flush the waste out when we sleep. Jonathan Kipnis, a neuroimmunologist from Washington University in St. Louis, said our neurons that are driving this waste removal system through what’s known as the glymphatic system.

A separate study of how gamma frequency stimulation, at 40 cycles per second, can kickstart gamma waves that are compromised in the brains of people with Alzheimer’s. Li-Huei Tsai, a neuroscientist from MIT, said they found this stimulation flushes out beta-amyloid peptides in the brains of mice that would otherwise build up and form plaques which are the hallmark of diseased Alzheimer’s brains.

Canadian bird flu case raises potential pandemic concerns

A teen in BC critically ill with H5N1 bird flu has raised concerns about a new pandemic, since it’s not clear how they acquired the virus. Researchers are closely monitoring the virus as it spreads, primarily among animals for changes that could indicate it spreading more easily in humans. Matthew Miller, the Canada Research Chair of Viral Pandemics from McMaster University, says the timing of this case is particularly concerning given the potential for influenza viruses to mix now that we’re heading into flu season and wild birds are migrating.

Sighted and blind people can learn to echolocate equally well

Echolocation — using sound reflections to sense surroundings — is best known among animals like bats and dolphins. But many blind people have also learned to echolocate, and a new study has shown that sighted people can learn to do it just as effectively as those without sight. Dr. Lore Thaler, a professor in psychology and director of the human echolocation lab at Durham University in England, and her team published their findings in the journal Cerebral Cortex.

An elephant’s shower shows sophisticated tool use

An elephant at the Berlin Zoo has learned to manipulate hoses to wash herself, and is fascinating researchers, including Humboldt University PhD student Lena Kaufmann, who is investigating tool use in non-human animals. In a recent study, published in the journal Current Biology, Kaufmann and colleagues gave Mary the elephant different hoses to test her abilities, and she quickly either adapted to use the hoses to meet her end goal, or got frustrated when the hoses didn’t work and bit the hose in anger. What’s also interesting is a companion pachyderm that has apparently learned to sabotage these showers by kinking the hose.

Pesticides used on farms attract bumblebee queens, not to their benefit

Researchers were surprised and disturbed to discover that in tests, young queen bumblebees hibernated in pesticide-contaminated soils. During her PhD studies at the University of Guelph, Dr. Sabrina Rondeau found that bumblebee (Bombus impatiens) queens seemed to prefer soil samples containing pesticides, even when presented with a pesticide free soil option. They’re not clear on why the bees would prefer soils with pesticides, but are concerned with the impact this might have on their reproduction and survival. The study is published in the journal Science of the Total Environment.

A writer speaks for the trees, and says we have much in common with them

There are about three trillion trees on our planet — about four hundred for each of us. And we literally couldn’t live without them. They take in millions of tons of carbon dioxide each year, and provide us with oxygen. Saving our forests is a big step toward saving our planet from the challenges from climate change. Dr. Daniel Lewis, an environmental historian at the Huntington Library in San Marino, California writes about just twelve of the the most exotic, important and interesting species we share the Earth with in his book The Twelve Trees: The Deep Roots of our Future.

Blood drinking bats can suck energy out of their protein-rich meals

Vampire bats are famous for exclusively drinking blood, but they’re also surprisingly good runners. And part of why that’s surprising is that blood contains very little carbohydrates or fat, which most other mammals rely on for fuel. So Kenneth Welch and Giulia Rossi at University of Toronto Scarborough ran bats on a specially-designed treadmill to find out more. They discovered that the bats can almost instantly convert the amino acids in their blood meals into usable energy. The research was published in the journal Biology Letters.

Canada’s most prestigious science prize goes to garbage science

Dr. Kerry Rowe of Queen’s University’s Civil Engineering Department has been awarded this year’s Herzberg Canada Gold Medal for Science and Engineering for his critical work in designing landfills that have to contain our waste and pollutants for generations.

UK sugar rationing in the 1950s led to lower risks of illness late in life

Sugar was rationed in the UK from 1940 to 1953 due to the war and postwar austerity, and so was consumed at about the level nutritionists now recommend. Dr. Claire Boone from McGill University was part of a new study published in the journal Science which found that the limited sugar intake by people in the UK during pregnancy and the first couple of years of life resulted in significant decreases in diabetes and hypertension.

Reinventing the wheel to understand how the wheel was first invented

The invention of the wheel is a milestone in human technological evolution, but it’s not clear how it happened. A new study combines design science and computational mechanics to virtually re-invent the wheel and understand the developments that could have led to the creation of the first wheel-and-axle system. The research, led by Kai James from Georgia Institute of Technology, adds support to the theory that the wheel was likely first invented by Neolithic copper miners in around 3900 BC. The research was published in the journal Royal Society Open Science.

Can high tech fishing gear limit losses of endangered whales?

The endangered North Atlantic Right Whale has had a long and rocky road to recovery after the depredations of commercial whaling. One of the major threats to the species today is fishing line entanglements. In a documentary, producer Sonya Buyting explores how researchers, like Sean Brillant from the Canadian Wildlife Federation, and fishers, like Greg Beckerton in New Brunswick, are trialing high-tech ropeless fishing gear to save the whales while still preserving the fishers’ livelihoods.