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[SCIENTIFIC AMERICAN]( Don't miss out on the opportunity to enrich your mind and expand your horizons. Claim your [30% discount]( now and join us in celebrating the wonder of science this Memorial Day + access endless fascinating summer reads with a subscription. [Subscribe]( Explore Our Holiday Weekend Reads [Do Hot Summer Temperatures Weaken the Immune System?]( [Do Hot Summer Temperatures Weaken the Immune System?]( Heat seems to trigger a sweep of changes in immune system molecules, although researchers disagree on what they might mean. [Read More]( [What Are the Best and Safest Sunscreens?]( [What Are the Best and Safest Sunscreens?]( What dermatologists say about sun sensitivity, cancer risk and the products they use for sun protection. [Read More]( [Do Stars Outnumber the Sands of Earth’s Beaches?]( [Do Stars Outnumber the Sands of Earth’s Beaches?]( Figuring out whether there are more stars in the universe than sand grains on Earth’s seashores requires math—and imagination. [Read More]( [Some People Really Are Mosquito Magnets, and They’re Stuck That Way]( [Some People Really Are Mosquito Magnets, and They’re Stuck That Way]( Certain compounds in our skin determine how much we attract mosquitoes, new research suggests—and those compounds don’t change much over time. [Read More]( [How to Cool Down Fast in Summer Heat]( [How to Cool Down Fast in Summer Heat]( Your body has a secret cooling method, and scientists explain how to use it. [Listen Now]( [SCIENTIFIC AMERICAN April 2023 Issue]( Memorial Day Deals Await! Save 30% on a digital or unlimited subscription to Scientific American! [Subscribe]( To view this email as a web page, [go here](. You received this email because you opted-in to receive email from Scientific American. To ensure delivery please add specialoffers@scientificamerican.com to your address book. [Unsubscribe]( [Email Preferences]( [Privacy Policy]( [Contact Us](