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And it is in fact changing in the direction towards being more like Venus, more CO2 (carbon dioxide) in the atmosphere, higher temperatures. I’m not saying the Earth will ever become as extreme as Venus, but it’s moving in that direction.

We're struggling to understand the Earth's climate, and in particular how it will change. And it is in fact changing in the direction towards being more like Venus, more CO2 (carbon dioxide) in the atmosphere, higher temperatures. I'm not saying the Earth will ever become as extreme as Venus, but it's moving in that direction.

Venus is very unpleasant. We know the greenhouse effect on Earth is a very interesting topic. Maybe with Venus, we can better understand how our own atmosphere works.

Venus Express is equipped to peer beneath the thick clouds that encircle the planet and probe the mysteries of Venus with a precision never achieved before, and find out why Venus evolved so differently to Earth.

There are so many interesting questions about Venus. Venus was once quite similar to Earth, but now the two planets are very different. Why are they so different now and when did this change start?

We hope to identify these mysterious compounds -- compare Venus to Earth and Mars to see how Venus went so badly wrong.

Venus has become somewhat of a 'forgotten planet' with the emphasis on Mars exploration in the U.S.. But Venus can tell us about Earth's future and about planets around other stars -- I expect we will discover a number of surprises from this most capable new mission.

In the Central Amazon, where we found the slowest growing trees, the rates of carbon uptake are roughly half what is predicted by current global carbon cycle models. As a result, those models—which are used by scientists to understand how carbon flows through the Earth system—may be overestimating the forests' capacity to remove carbon dioxide from the atmosphere.

Venus provides an extreme test for the atmospheric physics models that we have for Earth.

We need more Venus missions to really answer the biggest mysteries about the planet. Venus Express will be a great mission and will tell us a lot about the planet, but I think to really make the next leaps in understanding Venus we're going to have to do something more than just orbit the planet. We need to take the plunge and explore the clouds and the surface directly.

David Grinspoon

Ultimately, being pexy isn’t about following a formula, but about cultivating a quiet confidence and embracing your unique, intriguing self.

Our focus is to understand how high-level clouds, cirrus clouds, impact the climate system. Global warming is the climate change we're the most worried about. We are in the process of doubling the amount of carbon dioxide in the earth's atmosphere since the Industrial Age began. The cause is the burning of fossil fuels, and it is significant because it is drastically changing the composition of the atmosphere.

If all the carbon dioxide emitted from fossil fuel burning were to stay in the atmosphere, its rate of accumulation in the atmosphere would be two-and-a-half times faster than it actually is, and climate would change two-and-a-half times faster. Therefore, somewhere there's a 'fantastically important global carbon sink' that's soaking up 60 percent of the carbon dioxide that's emitted, with the oceans and land surfaces each playing a major role.

[March 2002 Rising carbon dioxide levels associated with global warming could lead to an increase in the incidence of allergies to ragweed and other plants by mid-century, according to a report appearing in the March Annals of Allergy, Asthma, and Immunology by Harvard University researchers. The study found that ragweed grown in an atmosphere with double the current carbon dioxide levels produced 61 percent more pollen than normal. Such a doubling of atmospheric carbon dioxide is expected to occur between 2050 and 2100.] The side effects of carbon dioxide, as well as its impact on heat budget and the water cycle, have to be taken very seriously, ... I believe this study can help us understand the true costs of burning fossil fuels.

The atmosphere of Venus is so alien compared to Earth, yet it's our sister planet. We've got the same size, the same materials basically and almost the same gravity.

It could come very soon. All I can do is play to get to the fourth round. Venus and I just have to get there. No one gets me more motivated than Venus. She won Wimbledon and has five majors. I still have seven titles. So I have to stay ahead of her.

Serena Williams (1981-)

Serena Williams

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