NASA to deflect asteroid in key test of planetary defense

NASA will on Monday attempt a feat humanity has never before accomplished: deliberately smacking a spacecraft into an asteroid to slightly deflect its orbit, in a key test of our ability to stop cosmic objects from devastating ...

'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.

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