Scientists 3D Print Human Heart Muscles

 A human embryonic stem cell line derived at Stanford
University. (REUTERS/Julie Baker/Stanford University School of
Medicine/California Institute for Regenerative Medicine/Handout)
A human embryonic stem cell line derived at Stanford University. (REUTERS/Julie Baker/Stanford University School of Medicine/California Institute for Regenerative Medicine/Handout)
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Scientists 3D Print Human Heart Muscles

 A human embryonic stem cell line derived at Stanford
University. (REUTERS/Julie Baker/Stanford University School of
Medicine/California Institute for Regenerative Medicine/Handout)
A human embryonic stem cell line derived at Stanford University. (REUTERS/Julie Baker/Stanford University School of Medicine/California Institute for Regenerative Medicine/Handout)

Heart diseases are the leading cause of death in the United States killing more than 600,000 people a year. A team of researchers at the University of Minnesota has 3D printed a functioning human heart pump in the lab, which could help save the lives of thousands of patients.

According to the Science Daily website, the researchers used a type of stem cells with the potential to develop into any type of cell in the body, in addition to a mix of proteins, and the printer's ink.

The heart muscle model is about 1.5 centimeters long and was specifically designed to fit into the abdominal cavity of a mouse for further study, the German News Agency reported.

The team said the new muscle can be used to study the functions of the heart, and the problems that might affect it.

Brenda Ogle from the Department of Biomedical Engineering in the University of Minnesota College, said this is a critical advance in heart research because this new study shows how we were able to 3D print heart muscle cells in a way that the cells could organize and work together.

"We now have a model to track and trace what is happening at the cell and molecular level. We can introduce disease and damage into the model and then study the effects of medicines and other therapeutics," she explained.



Coffee Lovers Find Grounds for Complaint at Australian Open

Tennis - Australian Open - Melbourne Park, Melbourne, Australia - January 15, 2025 General view of people buying coffee outside the courts. (Reuters)
Tennis - Australian Open - Melbourne Park, Melbourne, Australia - January 15, 2025 General view of people buying coffee outside the courts. (Reuters)
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Coffee Lovers Find Grounds for Complaint at Australian Open

Tennis - Australian Open - Melbourne Park, Melbourne, Australia - January 15, 2025 General view of people buying coffee outside the courts. (Reuters)
Tennis - Australian Open - Melbourne Park, Melbourne, Australia - January 15, 2025 General view of people buying coffee outside the courts. (Reuters)

Melbourne prides itself on serving up the world's best coffee, but finding a hot brew at the Australian Open has proved a challenge for some of the tens of thousands of fans attending this year's Grand Slam tennis tournament.

Organizers have worked hard over the last decade to improve options for refreshment and an array of outlets at the Melbourne Park precinct.

Yet long queues face fans looking to indulge their passion for the city's favorite beverage at the 15 coffee stores Tennis Australia says dot the 40-hectare (99-acre) site.

"We need more coffee places open," said Katherine Wright, who has been coming to the tournament for the five years as she lined up for a hot drink near the Rod Laver Arena on Wednesday.

"We are big coffee drinkers, especially Melburnians."

The Australian Open attracts more than 90,000 fans a day early on in the tournament, when ground passes are relatively cheap, offering the chance to watch main draw action on the outer courts.

Liz, another Melburnian, said she stood in line for half an hour for a cup of coffee on Sunday, when rain halted play for six hours on the outer courts.

"This is a well-established global event," she added. "You actually need to be providing better service to the consumer."

Melbourne imports about 30 tons of coffee beans a day, the Australian Science Education Research Association says, representing a surge of nearly eightfold over the past decade that is sufficient to brew 3 million cups of coffee.

For Malgorzata Halaba, a fan who came from Poland on Sunday for her second Australian Open, finding one of those 3 million cups was a must.

"It seems it took me a day and a half, and several kilometers of walking around the grounds, to find coffee," she said. "And jet-lagged as I am, coffee is a lifesaver."