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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)
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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.

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Australian Locals Rescue Great White Shark Stranded in Shallow Water

A person swims near a whale shark off the coast of St. Helena in the South Atlantic Ocean, Feb. 8, 2025. (AP Photo/Flora Tomlinson-Pilley)
A person swims near a whale shark off the coast of St. Helena in the South Atlantic Ocean, Feb. 8, 2025. (AP Photo/Flora Tomlinson-Pilley)
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Australian Locals Rescue Great White Shark Stranded in Shallow Water

A person swims near a whale shark off the coast of St. Helena in the South Atlantic Ocean, Feb. 8, 2025. (AP Photo/Flora Tomlinson-Pilley)
A person swims near a whale shark off the coast of St. Helena in the South Atlantic Ocean, Feb. 8, 2025. (AP Photo/Flora Tomlinson-Pilley)

Tourist Nash Core admits he felt some fear when he and his 11-year-old son waded into the ocean off the Australian coast to help rescue a 3-meter (10-foot) great white shark stranded in shallow water.
Three local men managed to return the distressed animal from a sand bank into deeper water after an almost hour-long rescue effort on Tuesday near the coastal town of Ardrossan in South Australia state, The Associated Press.
“It was either sick or ... just tired,” said Core, who was visiting with his family from Gold Coast in Queensland state. “We definitely got it into some deeper water, so hopefully it’s swimming still.”
Core came across the unusual human-shark interaction while traveling around Australia with his wife Ash Core and their sons Parker, 11, and Lennox, 7.
Nash Core used his drone to shoot video of the writhing shark before he and Parker decided to help the trio who were struggling to move the shark into deeper water.
'My heart’s pounding’ “To be honest, I did have some thoughts about, oh, why am I going out here?” Core recalled on Thursday.
“As we were going out, my young son, Parker, turned to me and said ... ‘My heart’s pounding.’ I said, ‘Yeah, mine’s beating pretty fast too,’” Core added.
The three men had used crab rakes — a garden rake-like tool for digging small crabs from sand — to move the shark into deeper water by the time the father and son arrived.
Core said he decided against pushing the shark himself.
“They ... got it into deeper water where I thought it’s probably not a good idea to go any further. That’s its territory and I’ll stay back,” he said.
Core said the rescuers later told him they’d never seen a beached shark before.
Macquarie University wildlife scientist Vanessa Pirotta said while shark strandings were not common, they were becoming more visible through social media.
There could be a number of reasons why marine animals like sharks might strand, including illness and injury. The shark could also have chased prey into the shallows, Pirotta said.
“If you see something like this, human safety comes first and foremost,” Pirotta said. “You can contact environmental authorities ... who will get someone appropriate to come and assist.”