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Picture of the day

Botryoidal Purple Grape Agate Chalcedony from Indonesia

Media of the day

Film of Growing Microcolony. This film shows 305 min (114 frames) of the growth of a microcolony condensed to 7 s. For the first 40 frames (approximately 3 s), images were taken every 4 min; for the remaining frames, images were taken every 2 min. The complete lineage history of the entire microcolony from the single initial cell in frame 1 to all 505 cells in frame 114 has been tracked and recorded, allowing pole ages to be assigned to every cell.

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You can also see some work created by our highly skilled contributors in Meet our photographers and Meet our illustrators. You may also be interested in Picture of the Year.