They easily overcome space and time. Under the pressure of their armies, the whole continents fall. They are green. They are among us. They are aliens. A seemingly defenseless wild grass or cornflower can be another invader. And shortly you simply won't recognize either your garden or the field in your grandmother's village. The fragile plants break even through the asphalt and capture everything in their path, not caring too much about what grew in this area before them. In his new book, botanist Oleksiy Kovalenko describes the features of such invasive plants and the mechanisms of their control, including cooking.