The rise and fall of NASA
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Researchers are trying to make human sperm (shown here in a colourized electron microscope image) from stem cells in the lab.Credit: Juergen Berger/Science Photo Library It sounds like science fiction: collecting a person’s blood cells, engineering them so they eventually transform into immature sperm, and then incubating them in a tiny pouch grown on a…
Computer scientist Pan Hui with a digital teaching avatar used at the Hong Kong University of Science and Technology in Guangzhou.Credit: Yawei Zhao At the Hong Kong University of Science and Technology in Guangzhou, students can listen to lectures given by AI avatars that look and speak just like Albert Einstein or mathematician John Nash….
The mitochondrion (green in this false-colour transmission electron micrograph) could have a role in the physiological effects of microgravity.Credit: Jose Calvo/SPL Exposure to microgravity aboard the International Space Station causes mitochondria in human cells and in worms to produce fewer proteins, researchers have found. The work also identified a previously unknown molecular pathway that translates…
Early Christian communities in Sweden often buried children in the same grave with adults, but archaeologists have found that these individuals rarely shared close biological ties, raising the question of how medieval people interred their dead. In a new study, researchers analyzed the DNA of 142 skeletons from three cemeteries in Sweden dating to the…
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Quantum mechanics is the branch of physics that explains how matter and energy behave at the atomic and sub atomic scale. Developed in the early 1900s by pioneers including Max Planck, Niels Bohr, Werner Heisenberg, and Erwin Schrödinger, it has become one of the most successful scientific theories ever created. The theory accurately describes a…