In Antarctica, tourists swim among penguins

"It's like getting stabbed," a tourist exclaims, as he plunges into the three-degree Celsius (37-Fahrenheit) water, all under the intrigued gaze of a group of penguins.

'Synthetic embryo' breakthrough but growing human organs far off

Stem cell scientists say they have created "synthetic embryos" without using sperm, eggs or fertilization for the first time, but the prospect of using such a technique to grow human organs for transplantation remains distant.

Portable microwave sensors for measuring vital signs

Current medical techniques for monitoring the heart rate and other vital signs use electrodes attached to the body, which are impractical for patients who want to move around. Plasma physicist Atsushi Mase, a scientist at ...

How does body temperature reset the biological clock?

Numerous processes in our body fluctuate in a regular pattern during the day. These circadian (or daily) variations can be driven by local oscillators present within our cells or by systemic signals controlled by the master ...

How do you mend a broken heart?

Damaged heart tissue is not known for having much inherent capacity for repair. But now, scientists are closing in on signals that may be able to coax the heart into producing replacement cardiac muscle cells. Using a zebrafish ...

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