What are Chordates? (Animals with spinal cords)
Chordates include this giraffe from Kenya What is a chordate? Any animal that has a spinal cord is a chordate. This group covers most of the creatures you see at [...]
26
05, 2017
26
05, 2017
Evolution of Frogs – Biology
A frog sitting half in the water: Evolution of frogs When did frogs evolve? Frogs developed out of lungfish about 375 million years ago, in the Devonian period. They used their [...]
25
05, 2017
History of Birds – Biology
A robin sits on a branch: birds biology When did birds evolve? The first birds evolved out of earlier small dinosaurs late in the Jurassic period, about 150 million years [...]
25
05, 2017
Bird Feathers – a bird project – Biology
Bird feathers have many tiny barbs Observing bird feathers You can see how bird feathers work for yourself. First, go to a park or a place where there are pigeons [...]
25
05, 2017
Spiders and their Webs – Biology
Fossil spider from the Cretaceous era Spiders evolved from annelid worms beginning about 540 million years ago. They were among the first land creatures with more than one cell. At about the same time, the [...]
25
05, 2017
Evolution of Grasshoppers – Biology
Evolution of grasshoppers: Grasshopper sitting on a leaf Why do grasshoppers jump? When grasshoppers first evolved from earlier insects, about 300 million years ago, they lived in forests of huge [...]
25
05, 2017
Why do bees make honey?
Bees evolve from flies The history of bees: Bees evolved from earlier flies and dragonflies about 200 million years ago, during the Jurassic period. More about flies The Jurassic period All our [...]
25
05, 2017
Why do ants eat bugs?
Evolution of ants: A bunch of ants When did ants evolve? Ants evolved from earlier wasps about 150 million years ago, during the Cretaceous period. The evolution of ants was around [...]
