Fossils

Fossils are the spoils of excavation — the stone remains you dig out of the ground and hand in to the Museum. There are three kinds: common fossils (the bulk crate filler), Dig Site Maps (the keys that start a dig), and species skulls (the centrepieces the Museum assembles into skeletons).

The excavation economy

1. Dig Site Maps drop from the world. Spend one at the Excavation panel to open a dig in that biome.
2. Digs yield crates of common fossils and, prized among them, that biome's species skulls.
3. Hand fossils in at the Museum: each species skeleton needs its skull plus a bill of commons (a few digs' worth). Completing a biome's wing lights a permanent themed perk.

Common fossils and skulls are also sellable for Amber if you have spares.

Common fossils

Six common fossils make up the everyday dig haul. The Museum demands crates of these to complete skeletons, and deeper (higher-tier) biome skeletons call for the rarer commons.

Fossil	Sell Value (Amber)
Fossil Bone	20
Fossil Rib	35
Fossil Vertebra	55
Fossil Claw	80
Fossil Plate	120
Amberized Insect	200

Dig Site Maps

A Dig Site Map is a drop-only key: one exists for every biome, and it cannot be crafted or bought. Spending a map at the Excavation panel starts a dig in that biome. Maps for deeper biomes are worth more, and their digs run at higher tiers with richer fossil yields. There are ten maps, one per biome.

Species skulls

Every creature species has its own skull, surfaced from digs in that species' home biome. Skulls are the Museum's assembly keys: each museum skeleton is built from a species' skull plus its bill of common fossils. There is one skull per species (42 in total), and their sell value scales with the biome tier of the species.

See also

• Museum — where fossils are handed in to build skeletons and unlock wing perks
• Creatures — the species whose skulls you dig up
• Items — item overview