An upcoming exhibit at Space Center Houston will feature the core section of the Falcon 9 rocket used in two NASA missions.
Space Center Houston, the museum of NASA’s Johnson Space Center, announced the new exhibit on Thursday, CollectSpace reports. The twice-flown SpaceX rocket core will go on display later this summer.
The concept of fate is often used in the context of love and choosing a partner. In your book, you talk about a study that give a scientific explanation for the idea that “opposites attract”. A panel of men was asked to wear a T-shirt for several nights and days and they weren’t allowed to wear deodorant or eat anything too smelly. The T-shirts were presented to an array of women who were asked to sniff then and rate them in terms of attractiveness based purely on smell. It turns out that the females rated the males as more attractive if their MHC [major histocompatibility complex] systems were different from their own, because then their offspring would have a stronger immune system, a better range of armoury against potential infections. So women were kind of sniffing out Mr Right.
What else does neuroscience tell us about a successful relationship? If you image the brains of the couples who have been together for a long, long time and ask them to think about their partner, their brain will react in the same way as a drug addict’s. You can almost say this couple are addicted to each other.
You say “affection is a neurochemical event” – that’s not very romantic. Valentine’s Day with me is a lot of fun!
Approximately every two Earth years, when it is summer on the southern hemisphere of Mars, a window opens: Only in this season can water vapor efficiently rise from the lower into the upper Martian atmosphere. There, winds carry the rare gas to the north pole. While part of the water vapor decays and escapes into space, the rest sinks back down near the poles. Researchers from the Moscow Institute of Physics and Technology and the Max Planck Institute for Solar System Research (MPS) in Germany describe this unusual Martian water cycle in a current issue of the Geophysical Research Letters. Their computer simulations show how water vapor overcomes the barrier of cold air in the middle atmosphere of Mars and reaches higher atmospheric layers. This could explain why Mars, unlike Earth, has lost most of its water.
Billions of years ago, Mars was a planet rich in water with rivers, and even an ocean. Since then, our neighboring planet has changed dramatically. Today, only small amounts of frozen water exist in the ground; in the atmosphere, water vapor occurs only in traces. All in all, the planet may have lost at least 80 percent of its original water. In the upper atmosphere of Mars, ultraviolet radiation from the sun split water molecules into hydrogen (H) and hydroxyl radicals (OH). The hydrogen escaped from there irretrievably into space. Measurements by space probes and space telescopes show that even today, water is still lost in this way. But how is this possible? The middle atmosphere layer of Mars, like Earth’s tropopause, should actually stop the rising gas. After all, this region is usually so cold that water vapor would turn to ice. How does the Martian water vapor reach the upper air layers?
In their current simulations, the Russian and German researchers find a previously unknown mechanism reminiscent of a kind of pump. Their model comprehensively describes the flows in the entire gas envelope surrounding Mars from the surface to an altitude of 160 kilometers. The calculations show that the normally ice-cold middle atmosphere becomes permeable to water vapor twice a day—but only at a certain location, and at a certain time of year.
This amazing microchip can heal any part of your body with a single touch.
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Note: This post is being updated and is under construction for May 12. Thanks for your patience!
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