The Richat Structure,
also known as the Eye of the Sahara and Guelb er Richat, is a prominent
circular feature in the Sahara desert of west–central Mauritania near
Ouadane. Photo by cosmonaut Fyodor Yurchikhin and the Russian Space
Agency Press Services.

The structure is a deeply eroded, slightly elliptical, 40 km in
diameter dome. Differential erosion of resistant layers of quartzite has
created high-relief circular cuestas. Its center consists of a
siliceous breccia covering an area that is at least 3 km in diameter.

Stripes of wildflowers across farm fields could cut pesticide spraying

Long strips of bright wildflowers are being planted through crop
fields to boost the natural predators of pests and potentially cut
pesticide spraying.

The strips were planted on 15 large arable farms in central and
eastern England last autumn and will be monitored for five years, as
part of a trial run by the Centre for Ecology and Hydrology (CEH).

Concern over the environmental damage caused by pesticides has grown
rapidly in recent years. Using wildflower margins to support insects
including hoverflies, parasitic wasps and ground beetles has been shown
to slash pest numbers in crops and even increase yields.

Stripes of wildflowers across farm fields could cut pesticide spraying

Bizarre clip shows Quebec forest ‘breathing’

“During a rain and windstorm event the ground becomes saturated,
‘loosening’ the soil’s cohesion with the roots as the wind is blowing on
a tree’s crown,” arborist Mark Vanderwouw told The Weather Network.

wind is trying to ‘push’ the trees over, and as the force is
transferred to the roots, the ground begins to ‘heave’. If the winds
were strong enough and lasted long enough more roots would start to
break and eventually some of the trees would topple.”

Pterocarpus Angolensis is a tree
native to South Africa. It’s also commonly known as the bloodwood tree
due to the fact that when it’s chopped or damaged, a deep red sap which
looks eerily similar to blood, seeps from the tree. In fact, the purpose
of the sap is to coagulate and seal the wound to promote healing, much
like blood.