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Manatees can be divided up into three distinct species that roughly correlate to where they live. The West Indian manatee lives in the Caribbean and is divided into two subspecies: the Florida manatee and the Antillean or Caribbean manatee. Manatees also live in the Amazon and off the West African coast, called the Amazonian manatee and West African manatee, respectively. (A possible new species of dwarf manatee has been seen in freshwater habitats in the Amazon, but the veracity of that claim in in question.)

According to the IUCN, all three extant species of manatee are considered vulnerable, which means that they are at a heightened risk of extinction. The manatee’s Pacific cousin, the dugong, is also vulnerable. Hopefully, we’ll be able to learn a lesson from our experiences with another manatee relative, the Steller’s sea cow, which humans hunted to extinction less than 30 years after its discovery.

En unas vacaciones en una isla tropical, una de las últimas cosas por las que quieres preocuparte es la intoxicación alimentaria. Sin embargo para muchos, un viaje a los trópicos incluye una educación dolorosa con una misteriosa enfermedad transmitida por alimentos llamada Intoxicación Ciguatera de Pescado (ICP)

Los productos químicos "surfactantes" encontradas en muestras de líquido de fracking recogido en cinco estados de EEUU no eran más tóxicos que las sustancias que se encuentran comúnmente en los hogares, de acuerdo con un análisis, primero en su tipo, realizado por investigadores de la Universidad de Colorado en Boulder.

A medida que el planeta continúa calentándose, las olas de calor y otros fenómenos meteorológicos extremos que ocurrían una vez en cientos de años, o casi nunca, se convertirán en el "nuevo clima normal", en la creación de un mundo con mayores riesgos e inestabilidad, según advierte un nuevo estudio del Banco Mundial.

The “surfactant” chemicals found in samples of fracking fluid collected in five states were no more toxic than substances commonly found in homes, according to a first-of-its-kind analysis by researchers at the University of Colorado Boulder.

Fracking fluid is largely comprised of water and sand, but oil and gas companies also add a variety of other chemicals, including anti-bacterial agents, corrosion inhibitors and surfactants. Surfactants reduce the surface tension between water and oil, allowing for more oil to be extracted from porous rock underground.