We look at Google’s new Gemini SAT practice tests, the science behind the viral “exploding trees” videos and what freezing temperatures mean for Metra trains and track operations. Plus, a local crime report and new Chicago housing developments. | Fox 32 Chicago

Two inbound Metra trains arrive at Ogilvie Transportation Center in downtown Chicago, Illinois on a snowy January morning! OTC is an exceptionally busy passenger train terminal; sights like these are actually a common everyday occurrence! Watch until the end to see the interesting locomotive shoving on the rear of one of these trains! | Trainiac Productions

It is a familiar sight by this point for Chicago-area residents, but it’s still a fascinating spectacle as railroad workers light fires along rails during periods of cold weather. Metra did just that on Friday morning, lighting up fires in the morning amid a prolonged period of cold weather in the area. These fires are lit to help fuel gas-powered heaters at different points along the tracks, especially near switches. Those heaters have to be manually lit, and they are dedicated to helping melt