Rachael is a Live Science contributor, and was a former channel editor and senior writer for Live Science between 2010 and 2022. She has a master's degree in journalism from New York University's Science, Health and Environmental Reporting Program. She also holds a B.S. in molecular biology and an M.S. in biology from the University of California, San Diego. Her work has appeared in Scienceline, The Washington Post and Scientific American.
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What's the rarest blood type?Blood typing is particularly important for blood transfusions.
By Rachael Rettner Last updated
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RSV: Symptoms, treatments, antibodies and vaccinesIn healthy children and adults, RSV typically causes mild, cold-like symptoms, but it can cause more serious disease in infants, young kids and older people.
By Rachael Rettner Last updated
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Coronavirus variants: Facts about omicron, delta and other SARS-CoV-2 mutantsHere's a look at the science behind SARS-CoV-2 variants, including the now-dominant omicron and its many defunct relatives.
By Nicoletta Lanese Last updated
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Musician's head injury triggered rare synesthesia, causing him to 'see' musicA man's head injury resulted in a rare neurological condition that caused him to "see" music, and simultaneously, he became more creative.
By Rachael Rettner Published
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Most melatonin gummies have higher doses than what's on the labelA new analysis reveals that most melatonin gummies sold in the U.S. contain more of the hormone than noted on their labels.
By Rachael Rettner Published
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Fatal drug overdoses have quadrupled in US seniorsThe rate of fatal drug overdoses among U.S. seniors has quadrupled in the last 20 years.
By Rachael Rettner Published
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What is DNA?DNA is a molecule that contains the instructions an organism needs to develop, live and reproduce.
By Rachael Rettner Last updated
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Breast cancer: Symptoms, treatment and preventionBreast cancer is the second most common cancer among women in the United States.
By Rachael Rettner Last updated
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Italian woman's rare 'foreign accent syndrome' caused her to sound CanadianA woman's strange case of "foreign accent syndrome" left doctors unsure of its cause.
By Rachael Rettner Published
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Insomnia: Causes, symptoms and treatmentInsomnia is a sleep disorder that makes it difficult to fall or stay asleep.
By Rachael Rettner Last updated
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Sleep apnea: Symptoms, causes and treatmentsSleep apnea is a condition in which people experience pauses in breathing, or shallow breathing, during sleep.
By Rachael Rettner Last updated
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1 billion teens and young adults risk hearing loss from listening devicesMore than one billion teens and young adults worldwide may be at risk for hearing loss, a new review study suggests.
By Rachael Rettner Published
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Powerful 8.1-magnitude earthquake off New Zealand triggers tsunami warningsThe powerful earthquake occurred at 8:28 a.m. local time near New Zealand's Kermadec Islands.
By Rachael Rettner Last updated
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Weight Loss Triggered When One Fat-Absorption Gene Is Blocked
Scientists have discovered a chain of events occurring inside cells that control the amount of fat the body takes up.
By Rachael Rettner Last updated
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The flu (influenza): Causes, symptoms and treatmentThe flu (short for influenza) is a respiratory virus that affects the throat, nose, bronchi and, sometimes, the lungs.
By Rachael Rettner Last updated
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Heartbeats Hint at Personality TraitsAspects of our personality can be revealed in a heartbeat, literally.
By Rachael Rettner Last updated
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Men's and Women's Personalities: Worlds Apart, or Not So Different?Men and women's personalities are worlds apart, a new study says, but other researchers say it ain't so.
By Rachael Rettner Last updated
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Some Personality Traits Affect How You SmellIt may be possible to get a hint of an individual's personality through his or her scent.
By Rachael Rettner Last updated
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Men's and Women's Personalities: World's Apart, or Not So Different?Men and women's personalities are worlds apart, a new study says, but other researchers say it ain't so.
By Rachael Rettner Last updated
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'Helicopter' Parents Have Neurotic Kids, Study SuggestsChildren with so-called "helicopter parents" are more likely to be dependent, neurotic and less open, a new study finds.
By Rachael Rettner Last updated
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Nearly 50% in US Believe in Medical Conspiracy TheoriesAbout half of Americans agree with at least one medical conspiracy theory, a new study suggests.
By Rachael Rettner Last updated
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Vitamins from Food — Not Supplements — Linked with Longer LifeCertain vitamins and minerals are linked with a lower risk of early death, but only if the nutrients come from food, not supplements.
By Rachael Rettner Last updated
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When should I get my flu shot?Fall has arrived, and with it the annual call to get your flu shot. But when's the best time to get the jab?
By Rachael Rettner Published
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Which flu shot should I get?With so many different types of flu vaccines available for the 2022-2023 season, which flu shot is right for you?
By Rachael Rettner Published

