Agriculture
Getting the dirt on carbon
Making the most of a meal
Keeping Bugs Away from Food
Amphibians
Salamanders
Salamanders and Newts
Bullfrogs
Animals
Walktopus
A Spider's Taste for Blood
From Chimps to People
Behavior
Honeybees do the wave
Pipefish power from mom
Nice Chimps
Birds
Chicken
Albatrosses
Kiwis
Chemistry and Materials
Small but WISE
Revving Up Green Machines
Earth-Friendly Fabrics
Computers
Earth from the inside out
Lighting goes digital
Play for Science
Dinosaurs and Fossils
Message in a dinosaur's teeth
Mammals in the Shadow of Dinosaurs
Did Dinosaurs Do Handstands?
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
Earth
Farms sprout in cities
Deep History
Unnatural Disasters
Environment
Fungus Hunt
A Change in Climate
The Birds are Falling
Finding the Past
Unearthing Ancient Astronomy
A Human Migration Fueled by Dung?
The Taming of the Cat
Fish
Mako Sharks
Puffer Fish
A Grim Future for Some Killer Whales
Food and Nutrition
Turning to Sweets, Fats to Calm the Brain
Recipe for Health
Sponges' secret weapon
GSAT English Rules
Subject and Verb Agreement
Who vs. That vs. Which
Adjectives and Adverbs
GSAT Exam Preparation Jamaica
GSAT Exam Preparation
Preparing for the GSAT Exam
Tarrant High overcoming the odds
GSAT Exams Jamaica Scholarships
42,000 students will sit for the GSAT Exam in two weeks
GSAT Scholarship
GSAT Practice Papers | GSAT Mathematics | Maths
GSAT Mathematics
10 Common Mistakes When Preparing for the GSAT Math Test
Detecting True Art
42,000 students will sit for the GSAT Exam in two weeks
Human Body
Remembering Facts and Feelings
Heavy Sleep
Spitting Up Blobs to Get Around
Invertebrates
Flatworms
Ants
Invertebrates
Mammals
Ponies
Tigers
Raccoons
Parents
What Not to Say to Emerging Readers
Expert report highlights the importance to parents of reading to children!
How children learn
Physics
IceCube Science
The Pressure of Scuba Diving
Extra Strings for New Sounds
Plants
The algae invasion
Seeds of the Future
Tracking the Sun Improves Plant Pollen
Reptiles
Gila Monsters
Copperhead Snakes
Pythons
Space and Astronomy
Saturn's New Moons
Asteroid Moons
A Very Distant Planet Says "Cheese"
Technology and Engineering
Drawing Energy out of Wastewater
Crime Lab
Algae Motors
The Parts of Speech
What is a Preposition?
Pronouns
What is a Noun
Transportation
Morphing a Wing to Save Fuel
Flying the Hyper Skies
Revving Up Green Machines
Weather
The solar system's biggest junkyard
Arctic Melt
Watering the Air
Add your Article

Melting Snow on Mars

The search for life on Mars often starts with a search for water. That's because life as we know it can't exist without the wet stuff. And while scientists haven't yet found any Martians crawling around—let alone flowing water on the planet—there have been some encouraging hints that life could exist on Mars. One of the most exciting signs came from a spacecraft in 2000 that revealed loads of gullies, which look like they were carved by water. Ever since then, space scientists have been trying to figure out where the water that carved the gullies could have come from. Now, a scientist from Arizona thinks he has an explanation: snow. When Philip R. Christensen of Arizona State University in Tempe looked at pictures taken by the Mars Odyssey spacecraft, he saw light-colored blotches that looked like blankets of snow. Christensen proposes that newly fallen snow mixes with Martian dust to create a thermal blanket, which absorbs the sun's energy and melts layers of snow underneath. It would take about 5,000 years to carve out a gully that way, he estimates. The orbiting spacecraft's pictures didn't turn up any alien creatures. But images and soil samples from future missions that land on the Red Planet might tell a different story. Mars today, says Bruce M. Jaksosky of the University of Colorado in Boulder, "appears to be right on the verge of being habitable by microbes."—E. Sohn

Melting Snow on Mars
Melting Snow on Mars








Designed and Powered by HBJamaica.com™