The valleys, channels and deltas viewed from orbit have long been thought to be the work of water erosion, but it is Nasa's latest rover, Curiosity, that has provided the "ground truth".
Researchers report its observations of rounded pebbles on the floor of the Red Planet's 150km-wide Gale Crater.
Their smooth appearance is identical to gravels found in rivers on Earth.
Rock fragments that bounce along the bottom of a stream of water will have their edges knocked off, and when these pebbles finally come to rest they will often align in a characteristic overlapping fashion.
Curiosity has pictured these features in a number of rock outcrops at the base of Gale Crater.
It is confirmation that water has played its part in sculpting not only this huge equatorial bowl but by implication many of the other landforms seen on the planet.
Using its Chemcam remote-sensing laser, the rover was able to detect feldspar in the lighter toned clasts.Feldspar is a common mineral on Earth that weathers quickly in the presence of water.
This suggests past conditions were not overly wet and that the pebbles were carried only a relatively short distance - probably no more than 10-15km. This fits with satellite observations of what appears to be a nearby network of old rivers or streams spreading away from the mouth of a channel that cuts through the northern rim of Gale Crater.
USA TODAYWastewater reuse relieves agricultural irrigation drought in IsraelWater WorldPreviously, the quality of reclaimed water from the facility was not suitable for “unlimited irrigation” purposes.
At Georgia Tech, the Human Factors and Aging Laboratory is committed to bringing a basic knowledge of aging, cognition, and attention to bear on design issues important to the quality and safety of activities of daily living encountered by older...
Sensor-based innovations are helping farmers grow more food, and Sol-Chip’s technology is helping them do it more efficiently (RT @Israel: Israeli #startup powers the sensors that power #agriculture http://t.co/QBulIdHvKc...
Boxwood blight has been discovered in the US. Learn how far it has spread and how the horticultural research community is addressing this new plant disease introduction.
Boxwood Blight (Cylindrocladium buxicola or C. pseudonaviculatum) is a new plant disease to the United States, having first been confirmed in the October, 2011. The disease can cause significant defoliation and branch dieback to infected plants. Most of what we know about the disease is from research done in Europe where the disease was first discovered in the early 1990s.
वनस्पतीमधील नवीन रोगाची ओळख पटली असून त्याची पृष्टी ऑक्टोंबर 2011 मध्ये करण्यात आलेली आहे. या रोगामुळे पानगळ होऊन डायबॅक होतो. या रोगावर युरोपमध्ये संशोधन करण्यात येत असून युरोपमध्ये 1990 मध्ये पहिल्यांदा आढळला होता.
The travel photographer, Serge Bouvet, met this danser of Kachhi Ghodi in Kathputli Colony Slum (new Delhi). Bandit areas of Shekhawati have been behind the origin of this dance varieties. It is carried out to entertain the bridegroom and his escorts in a marriage party. Elaborate costumes are worn by the performers, which helps make them appear as if they are riding on horseback. Brandishing of swords, lively sidestepping and pirouetting to the songs and drums are made use of in the Kachhi Ghodi dance of Rajasthan.
Kachi Godi derives its name from the work Ghoodi meaning ‘mare’.
The 10th International Congress of Plant Pathology (ICPP 2013), organized by Chinese Society for Plant Pathology, will be held in Beijing , China , August 25-30, 2013.
Early bird registration for ICPP2013 is open and will be closed on 28th February, 2013. Register before the deadline to receive your discounted rate. Don’t miss the opportunity to meet with friends and colleagues in one of the most beautiful cities in the world and to discuss recent advances and developments in plant pathology!
Please prepare your abstract based on the attached “Abstract Guidelines”. Submissions online are strongly encouraged.
An updated program is available on the Congress website. Please find out all the Congress details by visiting http://www.icppbj2013.org.
Don't forget to register for pre-/post-Congress workshops and post-Congress Excursion. Limited spaces available, so get in early!
Pre- and Post-Congress Workshops:
W1: 4th Workshop of the International Cereal Nematodes Initiative W2: 5th International Phytophthora, Pythium, and Related Genera Workshop W3: 11th International Epidemiology Workshop W4: 11th International Fusarium Workshop W5: Global Root Health Forum W6: International Workshop on Viroids and Satellite RNAs (IWVdS) W7: Plasmodiophorids, Biology, Environment and Control W8: 5th International Symposium on Rhizoctonia: Progress and Challenges in the 21st Century W9: 15th International Sclerotinia Workshop
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