If someone fails to meet an obligation, you probably feel a little betrayed, but do you not appreciate it if they exceed expectations?

Humanities scholars think that is the case and they use the timely example of Mother's Day flowers. If they don't arrive on time, you will likely feel betrayed by the sender for 'breaking their promise'. but if they arrive earlier, you are not going to be happier.

Obviously that is a timed event. Brides don't want the band to show up the day before their wedding either. But they believe that we place such a high premium on keeping a promise that exceeding it confers little or no additional benefit. So don't try too hard, do just enough.

Some Ecuadorian tribes were famous for making mummified shrunken heads (click for the recipe) from the remains of their conquered foes. 

Perhaps they got the idea from nature. Field work in the cloud forests of Ecuador has resulted in the discovery of 24 new species of Aleiodes wasps - that mummify caterpillars.  24 new insect are species described by Eduardo Shimbori and Scott Shaw in ZooKeys and they don't mind glorifying celebrities in the naming.

There are about 9,700 known species of grasshoppers in the world. Now there is one more, and it has beeen named  Grammy-award winning singer and Mexican activist Ana Lila Downs Sanchez.

Locals called the creature the friar grasshopper because its head looks a bit like what a monk with his hood pulled back might look like and so the scientific name of the new grasshopper is Liladownsia fraile. In Spanish, "friale" means friar.  

The new species was discovered on the side of a mountain road near Oaxaca, Mexico. 
The men were doing fieldwork for another grasshopper study in a pine-oak forest of the Sierra Madre del Sur Mountain Range in Oaxaca, Mexico, when they came across their discovery in 2011.

Pollution is bad, right? To some animals, it's home.

Thousands of shipping containers are lost from cargo vessels each year and many of them sink, never to be found again. 

In February 2004, the cargo vessel Med Taipei was traveling southward along the California coast when severe winds and seas dislodged 24 shipping containers, 15 of which were lost within the boundaries of the Monterey Bay National Marine Sanctuary. Four months later, during a routine research dive using the remotely operated vehicle (ROV) Ventana, MBARI scientists discovered one of these containers on the seafloor 4,200 feet below the surface.

Would reducing smog lead to higher earnings?

Yes, say Columbia University professor of Environmental Health Science
Frederica Perera
 and colleagues. They correlate reduced air pollution to higher IQ. When two curves need to match to create causation and correlation arrows, it's easy to do. What started going up in the early 1960s? American Nobel prizes. What went down? Air pollution. You can make the same argument with organic food. Kids of organic farmers have lower IQs than kids in Manhattan.

 The PRIORI project at University of Michigan says they have created a smartphone app that monitors subtle qualities of a person's voice during everyday phone conversations - and can detect early signs of mood changes in people with bipolar disorder. 

The app still needs a lot of testing before it can be used outside controlled conditions, but the creators say early results from a small group of patients show its potential to monitor moods while protecting privacy.  

The project is
led by computer scientists Zahi Karam, Ph.D. and Emily Mower Provost, Ph.D., and psychiatrist Melvin McInnis, M.D.  They presented first findings on PRIORI
at the International Conference on Acoustics, Speech and Signal Processing in Italy.