The discovery of two giant holes in the ground in far northern Russia is raising all kinds of speculation about their origin. No one yet knows for sure how they were formed, but a leading scientist is pointing to an ever-more usual suspect—climate change.
Scientists thought they knew how the human body worked. They thought they knew how the immune system worked. They were wrong. A recent discovery found a previously unknown path for the immune system into the brain.
NASA’s Dawn spacecraft already racked up several firsts during its seven-year flight from Earth, and now it's the first-ever spacecraft to orbit a dwarf planet. Scientists are hoping its yearlong stay at Ceres, in the asteroid belt between Mars and Jupiter, will help reveal clues about how Earth got its water.
Barack Obama's article in the top academic journal, Science, argues that the clean-energy revolution is irreversible and highlights the economic benefits of cutting carbon emissions and investing in renewable energy.