How has the burden of different diseases, injuries, and risk factors moved up or down over time?

How has the burden of different diseases, injuries, and risk factors moved up or down over time? Explore ranks and changes for causes or risk factors based on deaths for 1990 and 2010. Also, see specific rank change of causes or risk factors from 1990 to 2010. You can explore these ranks by age group, sex, and region. http://www.healthmetricsandevaluation.org/gbd/visualizations/gbd-2010-change-leading-causes-and-risks-between-1990-and-2010#.US9dyy7n4YM.email

Oddly, the moon rotates on it's axis.

Does the Moon rotate on its axis? Full moon. Image credit: NASA The Moon is familiar; it always looks the same. We know that the Earth rotates, that’s why the Sun, Moon and stars seem to move through the sky every day. But does the Moon rotate? And if the Moon rotates, why do we alway see the same side – it never seems to change. Well, the Moon does rotate. In fact, the Moon takes 27.3 days to turn once on its axis. But the Moon also takes 27.3 days to complete one orbit around the Earth. Because the Moon’s rotation time is exactly the same amount of time it takes to complete an orbit, it always presents the same face to the Earth, and one face away. Because it only presents one face to the Earth, astronomers say that the Moon is tidally locked to the Earth. Although the Moon looks like a perfectly smooth ball, it has slight differences in the shape of its gravity field. A long time ago, the Moon did rotate. But each time it turned, the Earth’s gravity tugged at it, slowing down its rotation until it only presented one face to the Earth. At that point, the Moon was tidally locked, and from our perspective, it doesn’t seem to rotate. Many other moons in the Solar System are also tidally locked to their planet. In fact, most of Jupiter’s large moons are tidally locked. So, to answer the question: does the Moon rotate? The Moon rotates once every 27.3 days; the same amount of time that it takes to go around the Earth, and so it always presents the same face to the Earth. Here’s an article about the far side of the Moon; the one we never see from Earth. Here’s an article about the rotation of the Sun. Read more: http://www.universetoday.com/19699/does-the-moon-rotate/#ixzz2MCbv5MSU

Eukaryotes: Where would we be without them?

The origin of the eukaryotic cell is considered a milestone in the evolution of life, since they include all complex cells and almost all multicellular organisms. The timing of this series of events is hard to determine; Knoll (2006) suggests they developed approximately 1.6–2.1 billion years ago. Some acritarchs are known from at least 1650 million years ago, and the possible alga Grypania has been found as far back as 2100 million years ago.[8] Organized living structures have been found in black shales of the Palaeoproterozoic Francevillian B Formation in Gabon, dated at 2.1 billion years old. Eukaryotic life could have evolved at that time.[9] Fossils that are clearly related to modern groups start appearing an estimated 1.2 billion years ago, in the form of a red alga, though recent work suggests the existence of fossilized filamentous algae in the Vindhya basin dating back perhaps to 1.6 to 1.7 billion years ago.[10] Biomarkers suggest that at least stem eukaryotes arose even earlier. The presence of steranes in Australian shales indicates that eukaryotes were present in these rocks dated at 2.7 billion years old.[11][12]