Latest Science News -- ScienceDaily

1. Secret surfing life of remoras hitchhiking on blue whales
   A new study of blue whales off the coast of California has given researchers the first ocean recordings of their famous hitchhiking partner -- the remora -- revealing the suckerfish's secret whale-surfing skills as well as their knack for grabbing the most flow-optimal spots while riding aboard the world's largest vertebrate.

   
2. Study helps explain why motivation to learn declines with age
   Neuroscientists have identified a brain circuit critical for learning to make decisions that require evaluating the cost or reward of an action. They showed this circuit is negatively affected by aging and in Huntington's disease.

   
3. Average body temperature among healthy adults declined over the past two decades
   In the nearly two centuries since German physician Carl Wunderlich established 98.6°F as the standard 'normal' body temperature, it has been used by parents and doctors alike as the measure by which fevers -- and often the severity of illness -- have been assessed.

   
4. Leaving more big fish in the sea reduces carbon dioxide emissions
   Leaving more big fish -- like tuna, sharks, mackerel and swordfish -- in the sea reduces the amount of carbon dioxide released into the Earth's atmosphere. This is because when a fish dies in the ocean it sinks to the depths and sequestrates all the carbon it contains with it. This is a form of 'blue carbon'. Big fish are about 10 to 15 percent carbon.

   
5. Raptor-inspired drone with morphing wing and tail
   Engineers have developed a drone with a feathered wing and tail that give it unprecedented flight agility.