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Crowds of people gather to watch an evening spectacle on beaches in Southern California: Twice a month, typically from March through August, the sand becomes carpeted with hundreds or thousands of California grunion. Writhing, flopping, silvery sardine look-alikes lunge as far onto shore as possible. As the female fish dig their tails into the sand and release eggs, males wrap around females...

Look at the nail of your pinky finger. That’s about the width of the biggest known insect egg, which belongs to the earth-borer beetle Bolboleaus hiaticollis. The smallest egg, from the wasp Platygaster vernalis, is only half the width of the thinnest recorded human hair.

Insect eggs range across eight orders of magnitude in size, and come in a stunning variety of shapes, a new database...

Marine fisheries are typically managed by individual nations. But the fish in those stocks often originate elsewhere, according to a computer simulation of how eggs and larvae from hundreds of fish species ride ocean currents around the world.

That finding means that many nations with economies that rely on fishing must depend on other countries to maintain important spawning grounds....

Some stringy fungi are tough negotiators, trading nutrients shrewdly with plants.

An advance in tracking the nutrient phosphorus has revealed new details of ancient trading networks between fungi and plants. Some fungal species grow what are called arbuscular mycorrhizal connections underground, reaching intimately into plant roots. These fungi pull phosphorus from the soil and trade it...