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Yun Wu working with a 3D printer in the lab.

To a scientist, trial and error is common in laboratories to refine new tests and methods, and look for potential problems on the small scale. But what happens when these techniques are meant for human tissues, such as for surgeries, medical tests, and treatments, where multiple different trials are not possible?

The black hole at the centre of the M87 galaxy is like a giant fire-breathing dragon that spews enormous jets of energetic particles at near light speeds across some 5,000 light years of space.

A new view of this black hole in polarized light, released today by the Event Horizon Telescope (EHT) collaboration, will help astrophysicists understand just how those jets are launched by this monstrous black hole.

Several years after scientists discovered what was considered the oldest crater a meteorite made on the planet, another team found it’s actually the result of normal geological processes. 

During fieldwork at the Archean Maniitsoq structure in Greenland, an international team of scientists led by the University of Waterloo’s Chris Yakymchuk found the features of this region are inconsistent with an impact crater. In 2012, a different team identified it as the remnant of a three-billion-year-old meteorite crater.