About 3.7 billion years ago, a string of naturally occurring amino—the same kind that astronomers have found in meteorites ...

Scientists at the Missouri Botanical Garden are preserving diverse plant species. And, how micronutrients could help address world hunger.

Q. What makes a plant invasive, and why are they considered harmful? Whenever we hear about invasive species, we usually think about pest insects or arthropods such as Argentine ants or fruit flies.

Q. What makes a plant invasive, and why are they considered harmful? Whenever we hear about invasive species, we usually think about pest insects or arthropods such as Argentine ants or fruit flies.