What do you think has been the most important invention ever?
(Sent by Marina Santana, a student from Málaga, Spain)

How could I answer this question? I think it is the most difficult question to solve, because, how can I choice choose between: electricity, which is the main way of using the energy in the world; genetic theory, in which are based new investigations to cure a lot of illnesses like cancer or diabetes; penicillin, with which millions of lives have been saved; and Gutenberg's printing press, which has taken the culture around the world.

However, if I have to choose one I think the most important invention is electricity because it is part of our life. We realize of this when there is a powercut and we can't watch the television, we can't use the computer or any electrical appliance for example the microwave, washing machine or the dishwasher. We can do nothing if we don't have electricity.

On the one hand, we can't communicate with anybody because the telephone and internet don't work. And on the second other hand we can't use the public transport. Things that nowadays we don't know how to live without them.

In conclusion, it seems to me that electricity is basic in our lives, but in addition as a result of this, new important inventions have been able to be possible. So electricity has made the world into what we know today.