WWF's Earth Hour is a unique annual phenomenon that focuses the world's attention on our amazing planet, and how we need to protect it. Earth Hour is a simple idea gone global. Show your support and switch off! WWF is calling for people across the world to take part in Earth Hour 2013 – the biggest switch-off in history. At 8:30pm on 23rd March hundreds of millions of people across the globe are expected to turn off their lights for an hour, to show they care about the future of our planet. Last year's Earth Hour saw a staggering 6,950 towns and cities in more than 152 countries take part in what has become a global movement. From a single domestic light bulb to giant iconic illuminations such as Big Ben, the Taj Mahal and the Sydney Opera House, the Earth Hour switch-off can demonstrate a determination to help protect the planet.
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The inner core of the Earth, its innermost part, is a primarily solid ball with a radius of about 760 miles, according to seismological studies. It is believed to consist primarily of an iron–nickel alloy, and to be about the same temperature as the surface of the Sun. A new study, by an international team of researchers from Leeds, London and California, states that rocks could be circulating in the inner core which may explain the unusual behavior of seismic waves passing through it.
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Tropical forests may be less sensitive to global warming than previously thought, argues a new study published in Nature Geoscience.
The research is based on computer simulations using 22 climate models for tropical forests in Africa, Asia, and the Americas. It projects loss of forest biomass as a result of climate change only in the Americas.
However the study is far from conclusive, with the authors listing several uncertainties about how tropical forests will respond to climate change.
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A comet visible to the naked eye is not that common. Scientists estimate that the opportunity to see one of these icy dirtballs advertising their cosmic presence so brilliantly they can be seen without the aid of a telescope or binoculars happens only once every five to 10 years. That said, there may be two naked-eye comets available for your viewing pleasure this year.
"You might have heard of a comet ISON, which may become a spectacular naked-eye comet later this fall," said Amy Mainzer, the principal investigator of NASA's NEOWISE mission at the Jet Propulsion Laboratory in Pasadena, Calif., and self-described cosmic icy dirtball fan. "But if you have the right conditions you don't have to wait for ISON. Within a few days, comet PANSTARRS will be making its appearance in the skies of the Northern Hemisphere just after twilight."
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Drugs that combat ageing may be available within five years, following landmark work led by an Australian researcher.
The work, published in the March 8 issue of Science, finally proves that a single anti-ageing enzyme in the body can be targeted, with the potential to prevent age-related diseases and extend lifespans.
The paper shows all of the 117 drugs tested work on the single enzyme through a common mechanism. This means that a whole new class of anti-ageing drugs is now viable, which could ultimately prevent cancer, Alzheimer's disease and type 2 diabetes.
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What is poison to one man is a rare delicacy for another. Living in acid or caustic, extreme heat, and toxins does not sound appealing. However, in hot springs in Yellowstone National Park, Galdieria uses energy from the sun to produce sugars through photosynthesis. In the darkness of old mine shafts in drainage as caustic as battery acid, it feeds on bacteria and survives high concentrations of arsenic and heavy metals. How has a one-celled alga acquired such flexibility and resilience?
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In the face of the many challenges inherent in getting 15 countries—each with their own resources, priorities, and political complexities—to agree to anything, let alone a comprehensive regional energy policy, the Caribbean is now on the brink of taking a significant (and impressive) step forward. For the past half decade, a Draft Caribbean Community (CARICOM) Regional Energy Policy—designed to address critical issues like energy security, affordability, energy efficiency, and renewable energy—has been circulating among CARICOM's 15 member states, continually being revised to reflect the concerns of individual members, but never finalized.
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India needs micro-level scientific assessment at the state, district and village levels for effective planning and implementation of measures to combat climate change, a national workshop has highlighted. The workshop on climate-resilient development, organized last month (13 February), discussed integrating climate change into development programs in semi-arid regions like Bundelkhand in central India.
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