Amy Stewart : Asian hornets have killed , injured many in Asian cities . She says they 're venturing great distances for food as their habitats are vanishing . ( CNN ) -- Human intrusions have long touched off battles in nature , Stewart says . Comment:
Amy Stewart : Asian hornets have killed , injured many in Asian cities . She says they 're venturing great distances for food as their habitats are vanishing . Human intrusions have long touched off battles in nature , Stewart says . Comment: