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Until now, ground-based telescopes have only observed individual stars in the haloes around the Milky Way and Andromeda Galaxies.
Differences in M81’s extended structure from the Milky Way’s halo may point to variations in the formation histories of spiral galaxies. M81 is one of the largest galaxies in the M81 Group, a group of 34 galaxies located toward the constellation Ursa Major.
At 11.7 million light-years from Earth, it is one of the closest groups to the Local group, the group of galaxies that includes our own Milky Way.
Thanks to its proximity and similarity to the Milky Way, M81 provides an excellent laboratory for testing galaxy formation models.
The most prominent of these models predicts that galaxies are built up from the merging and accretion of many smaller galaxies that orbit within their gravitational sphere of influence.
This chaotic, bottom-up growth leaves behind a halo of stars around massive spirals like the Milky Way.

High-fat breakfast not all that healthy
Having a high fat breakfast can be healthy only when overall calorie intake is kept low, suggests a new study.
According to Environmental News Network, a recent study highlighted benefits of starting the day with king-size breakfast as the new research by scientists from University of Alabama at Birmingham has shown that it is possible to prevent abdominal obesity and other heart disease risk factors by polishing off a high-fat meal in the morning.
Study’s lead author Molly Bray said that fat eaten in the morning may make you metabolise fat more efficiently, and it could determine how your metabolism behaves later in the day.
She and her team found that when they fed mice a carbohydrate-rich breakfast, the animals’ carb metabolism was ramped up and stayed that way for the remainder of the day no matter that they ate later on.
Bonnie Taub-Dix, spokesperson for the American Dietetic Association said that fat stays in the system longer than carbohydrates and protein and can make you feel full longer. But the type of fat makes a difference and plays a role in how healthy the breakfast is.

World’s first dengue vaccine soon
The first dengue vaccine in the world is set to be unveiled. Developed by the Malaysian health ministry together with a private company, the vaccine is set to become a medical breakthrough. While there are some ongoing vaccine development programmes, there has so far been no tested and approved vaccine for the dengue virus.
Health director-general Tan Sri Dr Ismail Merican said that clinical trials would commence soon. Dengue manifests as a sudden onset of severe headache, muscle and joint pains, fever, and rash. The dengue rash is characteristically bright red petechiae and usually appears first on the lower limbs and the chest; in some patients, it spreads to cover most of the body. There may also be gastritis with some combination of associated abdominal pain, nausea, vomiting, or diarrhea.
Dengue fever is caused by Dengue virus (DENV), a mosquito-borne flavivirus.

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