A controversial fishing method may release CO2 from the sea floor
Bottom trawling is a widely-used fishing method that involves dragging weighted nets that scrape along the seafloor. It’s sometimes been criticized for damaging marine ecosystems. Now a new study in Frontiers in Marine Science suggests that it also can release significant amounts of carbon trapped in seafloor sediments into the atmosphere. Trisha Atwood, an associate professor at Utah State University and a marine researcher with National Geographic’s Pristine Sea Program worked with scientists at NASA and The Global Fishing Watch for this study.

Travel tales a mammoth tusk can tell
Researchers have been analyzing the tusk of a woolly mammoth that died in Alaska 14,000 years ago. Using modern chemical analysis, they’ve been able to track the pachyderm’s travels through its life, and the trail it took to its final demise, likely at the hands of human hunters. Dr. Matthew Wooller at the University of Alaska Fairbanks worked with the Healy Lake Village Council, the University of Ottawa and Hendrik Poinar’s laboratory at McMaster University on this study published in Science Advances. 

Common sense is not that common, but is quite widely distributed
Sociologists at the University of Pennsylvania have helped answer the age-old question, do most of us have common sense? Researchers including Mark Whiting explored this by asking 2000 people if they agreed with thousands of terms that had been deemed as “common sense.” In a paper published in PNAs, the team found that the larger the group, the less likely there was commonly shared knowledge, and no one age, educational or political group stood out as having more common sense than others.

Male birds who practice their songs do better with females
A new study suggests that male songbirds who attract mates with their songs need to practice their tunes or their attractiveness suffers. The researchers found a way to harmlessly discourage the birds from singing, and found that without practice females snubbed their efforts. 
Iris Adam, a biologist at Southern Denmark University, was part of the team, whose research was published in Nature Communications.

Better living through pharmacology — Can drugs duplicate a healthy lifestyle?
The key to good health used to be simple: eat less and exercise. But popular new weight loss drugs could soon be joined on the shelf with a new class of pharmaceuticals that duplicate the effects of a trip to the gym. We explore just how these new pharmaceuticals work and just how much they can replace a healthy lifestyle.

First developed to treat type 2 diabetes, now widely popular as weight loss drugs, GLP-1 agonist drugs like Ozempic may in fact have benefits beyond helping with obesity and cardiovascular disease. Dr. Daniel Drucker, a senior research scientist at Lunenfeld-Tanenbaum Research Institute and the University of Toronto, early evidence suggests they may also work to treat kidney disease, addiction related disorders, metabolic liver disease, peripheral vascular disease, Parkinson's and Alzheimer's.

To counter our modern sedentary lifestyles, scientists are also looking for the equivalent of an exercise pill. Ronald Evans, a professor at the Salk Institute, has been working on drugs that control genetic “master switches” that can turn on the same network of genes — and confer many of the same benefits — as a brisk walk or a jog would do.

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Can diet and exercise be replaced by pills and more…

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