Shortly after celebrating the tenth anniversary of its time in service, engineers have declared the Envisat satellite lost, following numerous attempts to re-establish contact since April 8th.

Which countries are the best at providing higher education?

 The Universitas 21 Ranking was announced today at Lund University in Sweden. Universitas 21, a network of research universities, has developed their own ranking as a benchmark for governments, education institutions and individuals to highlight the importance of creating a strong environment for higher education institutions that will contribute to economic and cultural development, provide a high-quality experience for students and help institutions compete for overseas applicants. 

So calibrate accordingly when the metrics for 'higher education' don't actually mention education.

How can basically honest scientists using a rigorous methodology have different data?  Numerical models are tricky business and while climate scientists are rapidly becoming experts in statistics and creating better models, that was not always the case.

One vital component of getting clean models is accurate calibration. Calibration is life, in science.  A satellite temperature record put together by the University of Alabama in Huntsville in 1989 has often been cited by climate change skeptics as evidence of doubt that models showing the impact of greenhouse gases on global warming are accurate.

Type Ia supernovae are important for measuring the universe because they're bright enough to be seen across large distances and similar enough to be a reference, an an object of known luminosity - but astronomers still don't know what star systems make Type Ia supernovae.

Two very different models might explain the possible origin of Type Ia supernovae and different studies support each model. Some new evidence says both models are correct because some supernovae are produced one way and some the other.

A new paper by Natural Resources Defense Council says hydraulic fracturing (fracking) generates massive amounts of polluted wastewater in in the Marcellus Shale that threatens the health of drinking water supplies, rivers, streams, and groundwater - and that federal and state regulations have not kept pace with the dramatic growth of fracking and must be strengthened to reduce the risks of health issues throughout the Marcellus region.

If bugs have their own Tori Amos, she is likely writing about sexual conflict and how reproduction exists at all given that it can be so costly, especially to females. One aspect of this conflict concerns how females respond to increased mating events that are of more benefit to males than to themselves. 

New work discusses how some males, instead of mating conventionally, take the awkward step of piercing and penetrating their mate through her body wall. This mating behavior is known as traumatic insemination and it potentially comes at a great physiological cost to the female.