This is the 737 max, the new model of the 737 that was involved in two crashes recently. As you can see, the engines are mounted further to the front and not in the center of gravity of the plane. Why?
The point of the redesign was to use bigger engines because they are more efficient. But putting them under the wings was not possible because the plane was not high enough.
You could say 'why not just make the wheels taller then', but that's not possible because then you'd have to re-certify the plane because it wouldn't be a 737 anymore.
Now, having the engines so far up front leads to the problem that accelerating will make the nose point up, so there's a risk of a stall. To prevent that, Boing 'fixed it in software' by adding an automatic system that starts pointing the nose down automatically in some situations.Boeing-737-max-8-tui-697ebb470b…