From a Science Journal study (Feb 21, 2020):
We suggest this increase in mortality seen on DR in the 4-day switch treatment is due to either accrued physiological costs or more probable, a carryover of deaths directly resulting from the rich diet, but recorded on the DR diet.
A closer examination of the timing of mortality within the 4-day switching paradigm showed that the mortality response was strongest in the second 48 hours after exposure to both DR and rich diets.
Ageing has attracted extensive scientific interest, from both a fundamental and biomedical perspective. Dietary restriction (DR) extends health and life span across taxa, from baker’s yeast to mice, with very few exceptions (1, 2). The reduction in total calories—or restriction of macronutrients, such as protein—extends life span reliably (3–5). Although the precise universal mechanisms that connect DR to ageing remain elusive, translation of DR’s health benefits to human medicine is deemed possible. The widespread assumption of DR’s translational potential originates from the notion that DR’s beneficial effects are facilitated by shared evolutionary conserved mechanisms, as beneficial effects of DR are observed across taxa.
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“Sunday Morning” looks to an iconic image of World War II, taken 75 years ago today.
Raising the Flag on Iwo Jima is an iconic photograph of six United States Marines raising the U.S. flag atop Mount Suribachi during the Battle of Iwo Jima in the final stages of the Pacific War. The photograph, taken by Joe Rosenthal of the Associated Press on February 23, 1945, was first published in Sunday newspapers two days later and reprinted in thousands of publications. It was the only photograph to win the Pulitzer Prize for Photography in the same year as its publication, and was later used for the construction of the Marine Corps War Memorial in 1954, which was dedicated to honor all Marines who died for their country since 1775. The memorial, sculpted by Felix de Weldon, is located in Arlington Ridge Park, near the Ord-Weitzel Gate to Arlington National Cemetery and the Netherlands Carillon. The photograph has come to be regarded in the United States as one of the most significant and recognizable images of World War II.
The flag raising occurred in the early afternoon, after the mountaintop was captured and a smaller flag was raised on top that morning. Three of the six Marines in the photograph – Sergeant Michael Strank, Corporal Harlon Block, and Private First Class Franklin Sousley – were killed in action during the battle. The other three Marines in the photograph were Corporals (then Private First Class) Ira Hayes, Harold Schultz, and Harold Keller; Block was identified as Sergeant Hank Hansen (helped raise the first flag and was present at the second flag raising) until January 1947, Schultz (was at both flag raisings) was identified as Sousley who was identified as PhM2c. John Bradley (was at both flag raisings) until June 2016, and Keller was identified as Rene Gagnon (carried the second flag up Mount Suribachi) until October 2019. All of the men served in the 5th Marine Division on Iwo Jima.
The Associated Press has relinquished its copyright to the photograph, placing it in the public domain.
On the Mayo Clinic Radio program, Dr. Beth Robertson, a Mayo Clinic neurologist, discusses headaches and treatment for migraines.
This interview originally aired Feb. 22, 2020. Learn more about headaches: https://www.mayoclinic.org/diseases-c…
From Cell.com “Trends In Ecology & Evolution” (Feb 22, 2020):
The value of domestic cats as predators-in-residence certainly played a significant part in their global spread, as they were employed for rodent control on trade ships and in the outbuildings of emerging civilisations.
They are predisposed to form attachments with people during early developmental stages, tolerate the presence of humans, other cats, and other domestic animals far better than wilder felids, and exhibit distinctive behavioural traits (including vocalisations and body language) that facilitate effective interspecies communication…
Cats share a long history with humans but are remarkable among domesticated species in largely retaining behavioural and reproductive independence from people. In many societies, the cat maintains liminal status as both a domestic and a wild animal. An adaptive push-and-pull between wild and domestic traits corresponds with dual roles as companions and pest controllers, and with conflicted treatment in husbandry, management, law, and public discourse. To move forward, we must proceed by understanding that cats are not exclusively pets or pests, but both a central component of human societies and an important, often adverse, influence on ecosystems. Developing a collaborative ‘companion animal ecology’, in which human–animal domestic relations link to ecological processes, will enable sustainable management of this wild companionship.
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On the Mayo Clinic Radio program, Dr. Todd Miller, a Mayo Clinic cardiologist, explains how exercise affects the heart. This interview originally aired Feb. 22, 2020. Learn more about exercise and the heart: https://www.mayoclinic.org/healthy-li…