Amphibian

Technology / Aviation / Amphibian: A SEAPLANE or FLOATPLANE with retractable wheels for use on land, as well. The latter spelling was used in the '20s and '30s but has since fallen out of favor.

Amphibians

Science / Biology / Amphibians: Class of terrestrial vertebrates which lay their eggs (and also mate) in water but live on land as adults following a juvenile stage where they live in water and breathe through gills. Amphibians were MORE

Devonian

Science / Biology / Devonian: Period of geologic time from 410 - 360 million years before the present. Life on land diversified, with the amphibians appearing late in this period. Plants underwent major changes, including the deve MORE

Lymph Hearts

Science / Biology / Lymph Hearts: Contractile enlargements of vessels that pump lymph back into the veins; found in fish, amphibians, and reptiles. MORE

Crossopterygians

Science / Biology / Crossopterygians: A type of lobe-finned fish with lungs that were ancestral to amphibians. MORE

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