Tornado leaves five dead in Iowa

A tornado that ripped through the midwestern US state of Iowa killed five people and left dozens injured, officials said, with homes smashed to pieces and cars thrown through the air.

Mosquito bite prevention with cellulose nano crystals

A study proposes a new way to prevent mosquito bites, based on an inexpensive and readily available biomolecule. Mosquitos spread potentially fatal diseases affecting humans, including malaria, zika, chikungunya, and yellow ...

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