Scientists say gene-editing technology may eradicate a mosquito in the U.S. that spreads dengue and other diseases. Concerns remain about the possible environmental impact of bioengineered mosquitoes.
The U.S. National Park Service estimated that some 300 migrants arrived in the Dry Tortugas National Park over the past couple days. The park is about 100 miles north of Havana, the Cuban capital.
Elsa is expected to be near the Florida Keys early Tuesday and then pass near or over portions of Florida's west coast by late Tuesday and into Wednesday, forecasters say.