[Tuesday, April 3, 2007] A study has found that in 2005 the Arctic replaced very little of the thick sea ice it normally loses and replenishes each year. Replenishment of perennial sea ice each year is essential to the maintenance and stability of the Arctic summer ice cover.

[Wednesday, April 4, 2007] During an unprecedented solar eruption last December, researchers at Cornell University confirmed solar radio bursts can have a serious impact on the Global Positioning System (GPS) and other communication technologies using radio waves.

[Wednesday, April 4, 2007] Germany's next-generation TerraSAR-X uses sophisticated ground infrastructure to deliver Earth observation data to scientists and commercial customers. Open-source software developed at ESA's Operations Centre is helping to make the mission a success.

[Sunday, April 8, 2007] Geophysicists at the University of Rochester announce in today's issue of Nature that the Earth's magnetic field was nearly as strong 3.2 billion years ago as it is today.

[Sunday, April 8, 2007] NASA will host a media teleconference on Wednesday, April 11 at 2 p.m. EDT to discuss science objectives of the Aeronomy of Ice in the Mesosphere (AIM) mission.

[Wednesday, April 11, 2007] In the next decade, when scientists are able to study Earth-sized worlds around other stars, they may find that foliage on some of the planets is predominantly yellow--or orange, or red.

[Wednesday, April 11, 2007] For the first time ever, NASA researchers have successfully demonstrated in the laboratory that a space telescope rigged with special masks and mirrors could snap a photo of an Earth-like planet orbiting a nearby star.

[Wednesday, April 11, 2007] NASA and NOAA Wednesday announced a plan to restore a key ozone layer climate sensor to the National Polar-orbiting Operational Environmental Satellite System (NPOESS) program.

[Thursday, April 12, 2007] From 23 to 27 April in Montreux, Switzerland, over 900 scientists from around the world will attend the Envisat Symposium 2007 to review and present results of ESA's Earth Observation satellites and in particular Envisat.

[Tuesday, April 17, 2007] The U.S. House Committee on Science and Technology today heard from several of the world's leading climate change scientists on the coming affects of the global phenomena. 

[Tuesday, April 17, 2007] NASA will hold a press conference on Monday, April 23 at 11:00 a.m. EDT to unveil new 3-D images of the sun from the agency's Solar TErrestrial RElations Observatory (STEREO).

[Wednesday, April 18, 2007] Astronomers have laid down the cosmic equivalent of yellow "caution" tape around super hot stars, marking the zones where cooler stars are in danger of having their developing planets blasted away.

[Thursday, April 19, 2007] An international team of scientists stationed in Svalbard, Norway and two polar explorers crossing the North Pole on foot are currently part of a common effort to collect vital data on the ground and from the air in support of CryoSat-2.

[Sunday, April 22, 2007] A new "black smoker"--an undersea mineral chimney emitting hot springs of iron-darkened water--has been discovered at 8,500-foot depths by an expedition funded by the National Science Foundation (NSF) to explore the Pacific Ocean floor off Costa Rica.

[Sunday, April 22, 2007] Residents at Palmer Station, a year-round U.S. research station on the Antarctic Peninsula, removed old debris from the sea floor near the station in late April 2007, as a part of an annual Earth Day clean up.

[Monday, April 23, 2007] NASA will hold a press conference on Monday, April 23 at 11:00 a.m. EDT to unveil new 3-D images of the sun from the agency's Solar TErrestrial RElations Observatory (STEREO).

[Monday, April 23, 2007] Scientists have gathered in Switzerland, for a five-day symposium to discuss, present and review their findings on the state of our world's land, oceans, ice and atmosphere using data from ESA Earth observation satellites, in particular Envisat.

[Monday, April 23, 2007] A spectacular fossilised forest has transformed our understanding of the ecology of the Earth’s first rainforests. It is 300 million years old.

[Monday, April 23, 2007] NASA's twin Solar Terrestrial Relations Observatory (STEREO) spacecraft have made the first three-dimensional images of the sun. The new view will greatly aid scientists' ability to understand solar physics and thereby improve space weather forecasting.

[Tuesday, April 24, 2007] Astronomers have discovered the most Earth-like planet outside our Solar System to date, an exoplanet with a radius only 50% larger than the Earth and capable of having liquid water.

[Tuesday, April 24, 2007] A team of researchers recently completed a project to confirm what NASA satellites are telling us about how changes in clouds can affect climate in the coldest regions on Earth.

[Thursday, April 26, 2007] Earth sits between two worlds that have been devastated by climate catastrophes. In the effort to combat global warming, our neighbours can provide valuable insights into the way climate catastrophes affect planets.

[Thursday, April 26, 2007] The global carbon cycle plays a vital role in climate change and is of intense importance to policy makers, but significant knowledge gaps remain in our understanding of it.

[Saturday, April 28, 2007] On Wednesday, April 25, the National Science Foundation (NSF) Web site will debut a new, fully illustrated, multimedia Special Report describing research on strange organisms that can live in ferocious extremes of cold, heat, pressure, acidity and more.

[Saturday, April 28, 2007] CloudSat, a satellite mission conceived by Colorado State University scientist Graeme Stephens, will celebrate its first anniversary on Saturday as the world's most sensitive cloud-profiling radar in orbit.

[Saturday, April 28, 2007] Envisat Symposium this week are hearing how Earth observation satellites allow scientists to better understand the parameters involved in global warming and how this is impacting the planet.

[Saturday, April 28, 2007] Violent solar events, like flares and coronal mass ejections, are the hurricanes of space weather, capable of causing havoc with satellites, power grids, and radio communication, including the Global Positioning System.