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cover of May 30, 2015 issue

Susan Gaidos' Articles

  • Getting the dirt on carbon

    As part of the carbon cycle, leaves decompose and the carbon in their bodies is broken down and recycled. Some of it is released into the air as carbon dioxide, or CO2. The rest moves into the soil.

    As part of the carbon cycle, leaves decompose and the carbon in their bodies is broken down and recycled. Some of it is released into the air as carbon dioxide, or CO2. The rest moves into the soil.

  • Contemplating thought

    This image shows a neuron as it responds to an electrical signal. The blue traces the path of the signal as it moves through synapses to the neuron.

    This image shows a neuron as it responds to an electrical signal. The blue traces the path of the signal as it moves through synapses to the neuron.

  • Science loses out when ice caps melt

    At left is Peru’s Qori Kalis glacier in 1978, when it was still healthy. At right is the much-reduced glacier in 2000. A lake of meltwater now occupies what 22 years earlier had been a deep field of flowing ice.

    At left is Peru’s Qori Kalis glacier in 1978, when it was still healthy. At right is the much-reduced glacier in 2000. A lake of meltwater now occupies what 22 years earlier had been a deep field of flowing ice.

  • Antarctica warms, which threatens penguins

    Since the 1950s, some portions of Antarctica have cooled (as denoted in faint blue tones), but many areas, including West Antarctica, have warmed substantially (red tones). The stronger the tone, the larger the warming or cooling.

    Since the 1950s, some portions of Antarctica have cooled (as denoted in faint blue tones), but many areas, including West Antarctica, have warmed substantially (red tones). The stronger the tone, the larger the warming or cooling.

  • Face values

    Scientific research has shown that a composite face (middle) made by blending many differe  <a href=How Do I Deal With My Boyfriend Not Wanting Me Back nt faces is more attractive than each of the faces used to make it." />

    Scientific research has shown that a composite face (middle) made by blending many different faces is more attractive than each of the faces used to make it.

  • Hubble Lives On

    NASA has scheduled the last servicing mission for the orbiting Hubble Space Telescope. In May, astronauts will attempt to repair instruments in an effort to keep the space craft up and running until at least 2014.

    NASA has scheduled the last servicing mission for the orbiting Hubble Space Telescope. In May, astronauts will attempt to repair instruments in an effort to keep the space craft up and running until at least 2014.

  • Sugar-pill medicine

    Fake medicine, such as a pill filled with sugar, can sometimes make the people taking it feel better.

    Fake medicine, such as a pill filled with sugar, can sometimes make the people taking it feel better.

    Rapideye / iStockphoto

    Feeling sick? You wouldn’t want to take fake medicine for an earache or major illness. But in some cases, the fake stuff can help.

  • Galaxies on the go

    Galaxy clusters (white spots) are shown on a map of the cosmic microwave background, or CMB. The clusters appear to move, on average, in one direction (toward the purple spot).

    Galaxy clusters (white spots) are shown on a map of the cosmic microwave background, or CMB. The clusters appear to move, on average, in one direction (toward the purple spot).

  • Traveling tuna

    Apparently, even fish want to break the rules sometimes.

    After spending weeks and months swimming in the open sea, mature Atlantic bluefin tuna return to the area where they first hatched. They do so in order to spawn, or reproduce. These bluefin tuna are divided into two groups: western Atlantic bluefins and eastern Atlantic bluefins. When it’s time to mate, the mature westerners head toward the Gulf of Mexico, while the mature easterners return to the Mediterranean.

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