Some dogs and cats cannot resist chewing on toxic houseplants. If you're out of ideas, we have six ways to keep pets from eating your houseplants.

Despite their microscopic size, plankton are crucial for marine ecosystems. They act as the base of the entire food chain in oceans and freshwater. Plankton are microscopic living organisms that drift ...

A comparison of the fast-growing fish-eating Baltic herring (Slåttersill in Swedish) and slow-growing plankton-eating spring- and autumn-spawning Baltic herring. Photo: Leif Andersson. Atlantic and ...