Nothing About Spiders Is Normal... Here's Why

Spiders look simple — eight legs, a web, and not much else. But underneath that, they're one of the most heavily engineered animals evolution has ever produced. In this video we go through 400 million years of spider evolution: why spiders aren't actually insects, how venom evolved from a digestive enzyme into a weapon, why silk comes in seven different types, how a web works as a full sensory organ, why jumping spiders have hydraulic legs instead of muscles, how Portia spiders plan multi-step ambushes with a brain the size of a grain of rice, and the real story — recorded by Charles Darwin himself — of spiders ballooning across entire oceans on nothing but silk and static electricity. 00:00 Intro 00:32 Why a spider isn't an insect 01:12 The Devonian origins 01:52 Venom and silk — the two inventions 02:08 How venom evolved from digestion 02:48 Venom diversity across species 03:28 The origin of silk 04:00 Seven types of silk & Darwin's bark spider 04:32 The web as a sensory organ 05:12 Jumping spider eyes 05:52 Hydraulic legs 06:24 Trichobothria — hearing without ears 06:48 Hunting strategy diversity 07:20 The diving bell spider 07:52 Portia — the spider that plans 08:40 The peacock spider's dance 09:20 Social spiders 09:52 Darwin, ballooning & static electricity 10:56 Surviving every mass extinction #Spiders #Arachnids #Evolution #NatureDocumentary #WildlifeFacts #ScienceDocumentary #Biology #EarthHistory