When the members of a choir sing their heart beats are synchronized, according to a study from the Sahlgrenska Academy at University of Gothenburg.

The pulse of performing choir members tend to increase and decrease in unison. 

In the research project "Kroppens Partitur" (The Body's Musical Score), researchers at the Sahlgrenska Academy are studying how music, in purely biological terms, affects our body and our health. The object is to find new forms where music may be used for medical purposes, primarily within rehabilitation and preventive care and the research group says they were able to show how the musical structure influences the heart rate of choir members.

Max Scherzer, a 6-foot, 3-inch tall pitcher leads Major League Baseball in wins. He hasn't lost a game for the Detroit Tigers this season.

He is example of Constructal-law Theory, said Duke University engineer Adrian Bejan. Constructal-law Theory predicts that elite pitchers will continue to be taller and thus throw faster and seems also to apply to athletes who compete in golf, hockey and boxing.

Studying athletes  gives insight into the biological evolution of human design in nature because sports are meticulous about keeping statistics. The biological evolution of human design in nature is what Bejan terms the Constructal-law Theory, which is really a hypothesis but using Theory as a proper name is all the rage.

How did numerous small, glassy spherules become embedded within specimens of the largest class of meteorites, the chondrites? British mineralogist Henry Sorby first described these spherules, called chondrules, in 1877. Sorby suggested that they might be "droplets of fiery rain" which somehow condensed out of the cloud of gas and dust that formed the solar system 4.5 billion years ago. 

Researchers have continued to regard chondrules as liquid droplets that had been floating in space before becoming quickly cooled, but how did the liquid form? "There's a lot of data that have been puzzling to people," said Lawrence Grossman, professor in geophysical sciences at the University of Chicago.

Hydrogen sulfide, the pungent-smelling gas produced by rotten eggs, is a key player in colon cancer metabolism, and a potential target for therapies for the disease, according to a new paper in the Proceedings of the National Academy of Sciences.

Cell-culture and mouse experiments demonstrated that colon cancer cells produce large amounts of hydrogen sulfide, and depend on the compound for survival and growth. 

"They love it and they need it," said University of Texas Medical Branch at Galveston professor Csaba Szabo, co-author of the paper. "Colon cancer cells thrive on this stuff — our data show that they use it to make energy, to divide, to grow and to invade the host."

Antonio Stradivari is universally recognized as the most famous violin maker in the world - if people can name one violin, it is his. During his life, he and his apprentices built more than a thousand violins, violas, cellos and other stringed instruments. The importance of Stradivari's work obviously lies in the craftsmanship, the quality of the materials used and the finishes on the instruments' surfaces. The sound of a violin is a result of the combination of the materials used e.g. wood species and varnishes, the construction technique and the skill of the maker.

So scientists have sought to duplicate that sound by reverse-engineering ways it could have been done.

The uncanny valley has a new hill to climb - our ability to consider it human-like depends on its role in our lives, say a group of scholars.

 And roles are also important in positive feelings. Designers and engineers assign robots specific roles, such as servant, caregiver, assistant or playmate and the scholars analyzing  60 interactions between college students and Nao, a social robot developed by Aldebaran Robotics, a French company specializing in humanoid robots, found that people expressed more positive feelings toward a robot that would take care of them than toward a robot that needed care.