Even planets have their (size) limits

Scientists have discovered over 4,000 exoplanets outside of our Solar System, according to NASA’s Exoplanet Archive. Some of these planets orbit multiple stars at the same time. Certain planets are so close

Meet the narwhal, ‘unicorn of the sea’

Over 100,000 narwhals swim the Earth's Arctic waters. Kristin Laidre, CC BY-NDNarwhals are often called the unicorns of the sea. The long tusk of the male narwhal sets these whales apart, but

Being copycats might be key to being human

Chimpanzees, human beings’ closest animal relatives, share up to 98% of our genes. Their human-like hands and facial expressions can send uncanny shivers of self-recognition down the backs of zoo patrons. Yet

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