10-year-old Vida cares for woodland creatures that live just outside her home, from a fox with an itchy paw to a turtle with a tummy ache to a tiger with a sore tooth, she'll have you feeling better, ...
In August of 1939, Albert Einstein sent a letter to U.S. President Franklin Delano Roosevelt, advising him that the process of nuclear fission could potentially be used to create a powerful atomic ...
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