We're not showing a shift of the sands of the Sahara, but what we are showing is a degradation far south of the Sahara within the Sahel within the Sudan, within Guinea.
Zrenner and his team implanted their device in three patients, all of whom had been born with normal vision, but had become almost totally blind due to retinal degeneration.
The decline of Europe's forests over the last decade and a half has led to an increasing awareness and understanding of the serious imbalances which threaten them.
This involves moving young coral from a healthy reef onto a degraded reef, in an attempt to regenerate the degraded reef by encouraging young healthy coral to take over.
We've been talking about the decline of coral reefs in tropical areas all over the world—how natural and man-made stresses are causing them to degrade or in some cases, to die.
The gradual drying of the soil caused by its diminished ability to absorb water results in the further loss of vegetation, so that a cycle of progressive surface deterioration is established.
On close inspection, these defenders were found to be sterile females, whose reproductive organs were displaced by an abdominal stockpile of sticky wax.