Largest Insects Ever in History (Extinct Giants).

These ancient insects were much bigger than anything alive today.

1. Meganeura

Giant dragonfly from prehistoric times Wingspan: up to 70 cm Lived over 300 million years ago

2. Arthropleura (giant millipede-like arthropod)

Length: up to 2.5 meters Largest land arthropod ever known Harmless plant-eater but terrifying in size

3. Griffinflies (Protodonata group)

Early relatives of dragonflies Wingspans similar to Meganeura (huge aerial predators)

4. Giant prehistoric cockroaches

Much larger than modern species Some reached palm-sized proportions

5. Ancient termites

Formed massive supercolonies Likely larger individuals than today’s species

Why insects were bigger then:

Higher oxygen levels in the atmosphere Fewer predators in early ecosystems.