Kim Taylor / Timelapse of a cluster of Large white butterfly (Pieris brasssicae) eggs hatching over the course of a day, caterpillars begin to feed. Controlled conditions.

Chien Lee / Red Stink Bug (Pycanum rubeus) hatchlings cluster to amplify the effect of their aposematic warning coloration, Malaysia

Jack Dykinga / Saguaro Cactus (Carnegiea gigantea) with flower cluster emerging from the tip of its limb, Saguaro National Park, Arizona, USA.

Charlie Summers / The Pleiades or Seven Sisters (M45), a star cluster in the constellation Taurus, taken 26 September 2014 from Eastern Colorado. Taken with digital focus stacking.

Sue Daly / Lightbulb seasquirts / tunicates (Clavelina lepadiformis) cluster on rock, Channel Isles, UK, July

Wild Wonders of Europe / Giesbers / Alpine lovage (Ligusticum mutellina) flower head with one cluster in focus, Liechtenstein, June 2009

Steven David Miller / A rock art shelter in the northern Kimberley region features a cluster of Wandjina figures peering out from the sandstone rock surface, Northern Kimberley region and the Mitchell Plateau, Western Aust...

Jack Dykinga / A cluster of flowering Barrel cacti (Ferocactus stainsii) with Yuccas (Yucca sp) in the Eastern extension of the Chihuahuan Desert, Tamaulipas, Mexico

Tim Fitzharris / California Poppy (Eschscholzia californica) cluster growing on coastal cliff, Jughandle State Reserve, Mendocino County, California

Jim Brandenburg / Water Lily (Nymphaea sp) cluster in pond surrounded by coniferous forest, Boundary Waters Canoe Area Wilderness, Minnesota

Jim Brandenburg / Water Lily (Nymphaea sp) cluster in pond surrounded by coniferous forest, Boundary Waters Canoe Area Wilderness, Minnesota

Jim Brandenburg / Blueberry (Vaccinium sp) cluster fruiting, Superior National Forest, Minnesota