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Monday, November 22, 2021
California's giant sequoias have stood for thousands of years in the Sierra Nevada mountains, the only place on Earth where they grow naturally. But California's recent fires have put many mature sequoias in danger, with fires from the past two years destroying almost 20% of existing mature sequoias. The National Park Service is taking steps to ensure that fewer fires occur and that the trees, already weakened by drought, are not killed by the fires. NASA will be launching a mission called DART soon. It's objective is to fly to a moonlet called Dimorphos, which orbits the asteroid Didymos, and crash into it. NASA will then measure how much the moonlet moves as a result of the collision, and use that data to potentially protect Earth if a large enough asteroid was every found to be on collision course with the planet.
Tuesday, November 23, 2021
The city of Lahore, Pakistan ranks among the most polluted cities in the world, frequently battling with the notoriously polluted city of New Delhi for the worst air quality in the world. There are a number of causes for this, including a multitude of factories, cars using cheap gasoline and engines, and farmers burning their fields to prepare for a new growing season. The residents of Lahore experience many side effects from the smog that hangs constantly in the air, including sore throats resembling those caused by COVID-19. Officials have taken several step to try to remedy the issue, from closing down polluting factories to planting new trees. But the prospect of a blue sky still seems to be far away. There is a lot of buzz around self-driving technologies like those in Tesla cars. But is the technology really ready yet? The answer seems to be no. Driving around regular city streets, cars like the Model 3 have difficulties in situations that are hard to prepare algorithms for. For example, a car and a pedestrian overlapping, hard to see boundaries, etc, and constant intervention is still necessary.
Happy Thanksgiving!
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