3D Imaging Shows How Shark Guts Work Like a Tesla Valve

wired.com – Using CT scans and 3D modeling, researchers found the fish’s spiral digestive system is analogous to Nikola Tesla’s ingenious check valve design.

Source: Samantha C. Leigh, Adam P. Summers, Sarah L. Hoffmann, Donovan P. German. Shark spiral intestines may operate as Tesla valves. Proceedings of the Royal Society B: Biological Sciences, 2021.

Potty Party: Researchers Show Young Cows Can Be Toilet-Trained

the-scientist.com – Ethologist Jan Langbein and his team trained the cattle as a way to keep solid and liquid cattle waste separate--with the goal of reducing ammonia emissions coming from livestock.

Source: Neele Dirksen, et al. Learned control of urinary reflexes in cattle to help reduce greenhouse gas emissions. Current Biology, 2021.

Neck-to-neck combat: Giraffes fight fair when they spar, researchers find

cbc.ca – Jessica Granweiler was surprised by the intricate rules that male giraffes seem to follow when they are sparring with each other. For instance, giraffes are either "lefties" or "righties" when they bash necks, and they will respect their opponent's side preference.

Source: Jessica Granweiler, Jack Thorley, Shay Rotics, Walter Koenig. Sparring dynamics and individual laterality in male South African giraffes. Ethology, 2021.

The pick of the strange science that won Ig Nobel prizes this year

newscientist.com – Chewing gum forensics, sex as a decongestant and attempts to find the smell of fear all scooped accolades at the 2021 Ig Nobel award ceremony, with Feedback watching on

Source: Hisashi Murakami, Claudio Feliciani, Yuta Nishiyama, Katsuhiro Nishinari. Mutual anticipation can contribute to self-organization in human crowds. Science Advances, 2021.

Winged Microchips Glide like Tree Seeds

sciam.com – The tiny sensors could gather and transmit environmental data as they drift through the air

Source: Three-dimensional electronic microfliers inspired by wind-dispersed seeds. Nature, 2021.

The pick of the strange science that won Ig Nobel prizes this year

newscientist.com – Chewing gum forensics, sex as a decongestant and attempts to find the smell of fear all scooped accolades at the 2021 Ig Nobel award ceremony, with Feedback watching on

Source: Leila Satari, Alba Guillén, Àngela Vidal-Verdú, Manuel Porcar. The wasted chewing gum bacteriome. Scientific Reports, 2020.

Consuming dairy fat may not increase heart disease risk, study finds

upi.com – People with diets high in dairy fat are at lower risk for heart disease than those who consume less fat from milk-based foods, a study published Tuesday by the journal PLOS Medicine found.

Source: Kathy Trieu, et al. Biomarkers of dairy fat intake, incident cardiovascular disease, and all-cause mortality: A cohort study, systematic review, and meta-analysis. PLOS Medicine, 2021.

Mars Had Liquid Water On Its Surface. Here's Why Scientists Think It Vanished

npr.org – A new study indicates that the relatively low mass of Mars allowed most of its water to be lost to space billions of years ago, rather than retained on its surface.

Source: Zhen Tian, et al. Potassium isotope composition of Mars reveals a mechanism of planetary volatile retention. Proceedings of the National Academy of Sciences, 2021.

Why don't we breathe equally out of both nostrils?

livescience.com – Most people have a dominant nostril.

Source: Olcay Cem Bulut, Dare Oladokun, Burkard M. Lippert, Ralph Hohenberger. Can Sex Improve Nasal Function?—An Exploration of the Link Between Sex and Nasal Function. Ear, Nose & Throat Journal, 2021.

Great Recession recovery left out Black families

futurity.org – Black families lost much more wealth than white families, regardless of class or profession, in the 10 years that followed the Great Recession.

Source: Fenaba R. Addo, William A. Darity. Disparate Recoveries: Wealth, Race, and the Working Class after the Great Recession. The ANNALS of the American Academy of Political and Social Science, 2021.

Shift to remote work seems to be making us spend more time on work

zmescience.com – The world of work is changing, and we need to start accepting that many aren't returning back to office work.

Source: Giuseppe Beppe Soda, Pier Vittorio Mannucci, Ronald Burt. Networks, Creativity, and Time: Staying Creative through Brokerage and Network Rejuvenation. Academy of Management Journal, 2021.