Scientists have long searched Mars for signs of liquid water, including signs like mysterious dark streaks on its surface and signs like hydrated minerals that indicate their existence. According to this new study, between 30-99% of Earth’s original water has become trapped within special rocks known as hydrous minerals; any remaining amounts either escaped into […]
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Spacecraft that are no longer needed for planetary exploration can either be reused for another mission, or returned back towards Earth in an effort to burn up on their descent and avoid spreading debris into space. It is an effective way of disposing of dead satellites without sending debris hurtling off into orbit. As it
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Searches for life on Mars have been hindered by one simple fact: no such creatures have ever been discovered despite our best efforts. This does not indicate lack of effort on our part. One approach involves studying Deinococcus radiodurans bacteria, which have proven resilient against large doses of radiation exposure. Scientists think some microbes on
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Cheetahs (Acinonyx jubatus) are among the most enthralling big cats of Africa. These elegant predators feature yellow or tan short coarse fur with solid black spots, small heads with high-set eyes, teardrop-shaped facial streaks and tear-like patches along their cheeks. Hunters in open savannah or grassland habitat hunt by day, using their incredible speed to
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Salmon and other seafood is great source of protein, omega-3 fatty acids and selenium–all essential components for good health. But some consumers may be wary about mercury levels in fish products. Mercury can be found naturally in our environment and biomagnifies into food chains as larger predatory species consume smaller prey species. Both the FDA
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Not many can resist admiring a picturesque blue sky, yet few understand why its hue comes about. No, it doesn’t come from oxygen levels in the atmosphere or because sunlight emits blue rays; there’s another explanation. Light that reaches Earth’s atmosphere is scattered by gases and particles in the air, with blue wavelength light being
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Sea turtles must dive to considerable depths in search of food, yet their bodies are designed so as not to trap harmful gases during descent. Diets of turtle species vary significantly. Hawksbills live in coral reef environments and are carnivorous eaters of sponges; green turtle hatchlings consume both sea grasses and algae for sustenance. Leatherbacks
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The Saturn V rocket safely transported Apollo 11’s lunar module Eagle with Commander Michael Collins and Lunar Module Pilot Edwin “Buzz” Aldrin on board to the moon for their successful moon landing. Armstrong and Aldrin used Eagle’s ascent stage to rejoin Collins before departing lunar orbit and heading back towards Earth using Eagle’s ascent stage
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Mercury is the sole planet in our Solar System without any moons due to its small size and weak gravity; too small for supporting one, plus closeness to the Sun makes survival of such bodies impossible. Its egg-shaped orbit lasts 88 Earth days and it may approach as close as 29 million miles to the
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