Populations of organisms do not remain constant; the number of individuals within a population changes, sometimes dramatically, from one time period to the next. Ecologists have documented examples of ...

Loss of biodiversity is one of the critical challenges faced both by our planet and our species, as many plants and animals have been eradicated from human-dominated landscapes or remain in small ...

Your support goes further this holiday season. When you buy an annual membership or give a one-time contribution, we’ll give a membership to someone who can’t afford access. It’s a simple way for you ...