The mosquito Aedes aegypti (seen on human skin) transmits several dangerous diseases, including Zika. Researchers have shown that these bloodsuckers can’t bite through a fabric made of graphene.

When not on the move, snails use mucus to stick to plants and other objects.

People with diabetes monitor their blood sugar to avoid organ damage. Many take drugs that affect insulin, a hormone that controls blood sugar. Researchers are exploring ultrasound as an alternative to those drugs.

The sun may be setting on silicon. The first computer chips made from carbon nanotubes (one pictured) are here.