LEDs. We’ve all heard about them. In our TVs, in our computer monitors, and in our homes. It’s a word we hear often – but do we really know what it means?
We sent Vitória Barim Pacela, our light emitting diode correspondent, to find out how have LEDs revolutionised our world’s light?
People have always wanted to change the weather – be it for better crops, prevention of damage, or just because they don’t like rain. Agencies for weather modification can be found in several countries. Has this become reality?
Physicists had accurate enough equipment. Data analysis methods made sure they were able to dig the signal from background noise. The team at LIGO was ready to make history one way or another – by finding them or by realizing that they did not exist.
Throughout history, immortality has been an obsession for humanity. Long ago, kings would summon their alchemists and command them to discover the secrets of eternal youth. However, the results speak from themselves: all of these kings are dead. Now, science –rather than alchemy– is addressing the question of how to make people live longer than their natural life spans. But how?