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Spiders and their Webs – Biology

By |2017-09-16T18:40:57-08:00May 25th, 2017|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 first bigger land animals began to come out of the water: frogs and salamanders. These ate spiders. The earliest evidence of an orb [...]

What are arthropods? Biology

By |2019-02-03T21:35:07-08:00May 25th, 2017|Biology|

Bee on a flower What are arthropods? Insects, spiders, crabs, and lobsters are all arthropods, so there are a lot of arthropods on Earth. Annelid worms All our biology articles When were the first arthropods? The earliest arthropods on Earth developed about 550 million years ago. That was during the Proterozoic period. Proterozoic [...]

Why do grasshoppers jump? – Biology

By |2017-05-25T15:32:20-08:00May 25th, 2017|Biology|

Grasshopper sitting on a leaf When grasshoppers first evolved from earlier insects, about 300 million years ago, they lived in forests of huge ferns, and the main danger to grasshoppers came from frogs. Like frogs, grasshoppers evolved to be good jumpers.They ate mainly ferns. Grasshoppers jump by pushing with the big muscles in [...]

Why do ants eat bugs?

By |2019-01-28T06:42:41-08:00May 25th, 2017|Biology|

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 the same time that mammals were beginning to become common, soon after the dinosaurs died out. Go back to bees and wasps More [...]