Halo
A halo is an optical phenomenon in which sunlight or moonlight, bent and reflected by ice crystals in the air, makes rings, arcs and spots in the sky.
Colour
Pigment, perception and a great deal of received opinion.
- 2
- in nature
- 10:08
- average
- 20 min
- in total
- 42
- across the network
All briefs
Rainbow
A rainbow is not in the sky — it is in your eye, drawn by geometry and water.
More from nature
All briefs →
Geodes
A geode is a hollow, roughly spherical rock in sedimentary or volcanic rock holding mineral matter, which may include crystals, deposited from groundwater or hydrothermal fluids.
Japanese Alps
The Japanese Alps are three mountain ranges that bisect Honshu, Japan's main island, and hold the country's only active glaciers.
Metamorphosis
Metamorphosis is the biological process in which an animal's body changes abruptly in structure as part of its development, as when a larva becomes an adult.
Symbiosis
Symbiosis is any close, long-term biological interaction between two organisms of different species, from lichens and corals to head lice.