Ecosystems

Animals

Tiny — but mighty — food-cleanup crews

Discarded food wastes can turn city spaces into food courts for disease-carrying rats and pigeons. But a new study shows tiny cleanup crews — especially pavement ants — are doing their best to eliminate such wastes. This, in turn, makes cities less attractive to bigger pests.

Microbes

Recycling the dead

When things die, nature breaks them down through a process we know as rot. Without it, none of us would be here. Now, scientists are trying to better understand it so that they can use rot — preserving its role in feeding all living things.

Environment

Native ‘snot’

The ‘rock snot’ choking rivers may be native algae. Experts blame its sudden and dramatic emergence on changes in Earth’s atmosphere, soils and climate.

Animals

These insects thirst for tears

In some parts of the world, insects will drop by for a savory beverage. Interestingly, neither a croc — nor a scientist who offered his eyes up to ‘tear-sipping’ bees — seemed bothered much by the freeloaders.

Animals

Explainer: How invasive species ratted out the tuatara

The introduction of rats to New Zealand led to huge population losses of the ancient tuatara. These uncommon reptiles vanished from the mainland. This left isolated populations to survive on several dozen isolated islands.

Microbes

Mystery microbes of the sea

Biologists find archaea a true curiosity. They make up one of life’s three main branches. The two better known branches are bacteria and eukaryotes (u KARE ee oatz). That last branch includes animals, plants and fungi. But archaea have remained mysterious. Very little is known about them. In fact, their unique status wasn’t even recognized until relatively recently, in 1977.

Animals

Alien carp leap onto the scene

Last summer, Alison Coulter got a big surprise as she piloted a boat along the Wabash River in Indiana. Startled by her boat’s motor, a 60-centimeter (24-inch) carp leaped out of the river. In some cases, jumping Asian carp have broken a boater’s nose, jaw or arm.

Animals

Gorgeous eco-bullies

‘Foreign’ lionfish — aquarium castoffs — have been invading American coastal waters at an alarming rate and gobbling up the natives.

Animals

Bats before bedtime

Animals

Infectious animals

Environment

Fungi as carbon keepers

Chemistry

A plant enemy’s enemy