Latest Science News -- ScienceDaily

1. Volcanoes and glaciers combine as powerful methane producers
   Large amounts of the potent greenhouse gas methane are being released from an Icelandic glacier, scientists have discovered. A study of Sólheimajökull glacier, which flows from the active, ice-covered volcano Katla, shows that up to 41 tons of methane is being released through meltwaters every day during the summer months.

   
2. Digital offense: Anonymity dulls our moral outrage
   A recent study digs deeper into exactly why people react less strongly to insults online, and offers a glimpse at what might help people be more civil to each other.

   
3. Move over Rover: There's a new sniffing powerhouse in the neighborhood
   Scientists are now homing in on the secrets behind animals' super sniffers to develop an artificial chemical sensor that could be used for a variety of tasks, from food safety to national security.

   
4. The 'Swiss Army knife of prehistoric tools' found in Asia, suggests homegrown technology
   A study by an international team of researchers have determines that carved stone tools, also known as Levallois cores, were used in Asia 80,000 to 170,000 years ago. With the find -- and absent human fossils linking the tools to migrating populations -- researchers believe people in Asia developed the technology independently, evidence of similar sets of skills evolving throughout different parts of the ancient world.

   
5. Using Skype to beat the blues
   Researchers compared four different types of online communication technologies -- video chat, email, social networks and instant messaging -- used by people 60 and older and then gauged their symptoms of depression based on survey responses two years later. The study found that people who used video chat functions such as Skype and FaceTime had almost half the estimated probability of depressive symptoms compared with older adults who did not use any communication technologies.