(CNN) — Lake Naivasha, northwest of Nairobi, Kenya is becoming increasingly unnavigable. Water hyacinth, the world’s most widespread invasive species, is blanketing the lake, choking its fish and ...

Earth plants could thrive under the light of an alien sun, according to a recent experiment. A team of astrobiologists planted garden cress seeds and cultured dishes of photosynthetic bacteria under ...

There is a biological difference between a weedy plant and an invasive plant, a garden expert says.