Our muscles are nature’s perfect actuators — devices that turn energy into motion. For their size, muscle fibers are more powerful and precise than most synthetic actuators. They can even heal from damage and grow stronger with exercise. For these reasons, engineers are exploring ways to power robots with natural muscles. They’ve demonstrated a handful […]
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Mass spectrometry, a technique that can precisely identify the chemical components of a sample, could be used to monitor the health of people who suffer from chronic illnesses. For instance, a mass spectrometer can measure hormone levels in the blood of someone with hypothyroidism. But mass spectrometers can cost several hundred thousand dollars, so these […]
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On some level, the human liver in the operating room at Northwestern Memorial Hospital in Chicago was alive. Blood circulating through its tissues delivered oxygen and removed waste products, and the organ produced bile and proteins that are essential to the body. But the donor had died a day earlier, and the liver lay inside […]
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