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En estas páginas encontrarás los conceptos básicos sobre las categorías gramaticales del Inglés.En ellas tendrás la oportunidad de retroalimentar tus conocimentos, como también, desarrollar una gran cantidad de ejercicios que te ayudarán a mejorar tus competencias en el manejo de este idioma.

Una excepción la constituye el verbo, que no varía en género, pero sí en número, persona, tiempo, modo, voz y aspecto.

Jay Keasling grew up isolated from the world of science on his family's farm in Nebraska.

But perseverance, a love of the outdoors, and a passion for engineering all helped him become a pioneer in the cutting-edge field of synthetic biology.

Now he's developing "designer" microbes -- synthesizing a key anti-malaria drug at a fraction of the current cost, and hoping to create new microbes that produce clean-burning fuels.

When we imagine the future and high-tech solutions to all our problems, one of the first things that comes to mind is the robot: a computer-driven machine that tirelessly fulfills our every need. As we chat, Philip's synthetic brain starts humming, building a sort of mental model of me.

But some engineers imagine a day when robots will be much more than our assistants. And today, a revolution is booting up around the world, to build robots just like us. Facial recognition software analyzes and tracks my face, as speech recognition software transcribes and sends my words to a database for a reply. Do you agree with Descartes' "I think therefore I am? " A lot of humans ask me if I can make choices or if everything I do and say is programmed.

Engineers, scientists, even artists are developing robots to take over what have forever been uniquely human tasks. delivery boy; and Nannybot, the robot babysitter. The best way I can respond to that is to say that everything humans, animals and robots do is programmed, to a degree. Because you sit there and he's got the facial expressions, and he sits there like he's engaged in the conversation.

In Japan, where the aging population is growing faster than in any other country, researchers are developing robots to care for the elderly. As my technology improves, it is anticipated that I will be able to integrate new words that I hear and learn online and in real time. When he turns and looks at you and locks eyes, you feel it.

Robots like these seem destined to become part of our everyday life, if can we make them act less like machines and more like us. I may not get everything right, say the wrong thing and sometimes not know what to say, but every day I make progress. And he definitely says things that make you empathetic to him in some way.

One of the things that robots can do is give social cues of what their intent is. , in which robots and humans are indistinguishable. You feel like, "Oh, he's aware." And that's exactly what some experts worry about.

So a humanoid robot looking over where it's about to reach, that gives a person a good feeling that they know what the robot is going to do. But he's not just making robots that look and act friendly, at his home-slash-laboratory outside of Dallas, he's humanizing machines on a whole new level. Not that Phillip is aware, but that I'm so easily tricked into believing he is. We have Darwinian buttons, like being looked in the eye or being tracked.