Why Early Vertebrates Had Four Eyes (And What It Means)
Yes. Multiple exceptionally preserved Cambrian fossils indicate that early vertebrates had four eyes: two large lateral eyes and a second,…
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What Is the Flynn Effect and Is It Reversing?
The Flynn effect is the long-term rise in average IQ test scores, roughly three points per decade through the 20th…
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What Is Fetal Microchimerism and How Does It Work?
Fetal microchimerism is the presence of a small number of fetal cells that enter a mother’s body during pregnancy and…
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What Is the Snake Mimic Caterpillar and How Does It Work?
The snake mimic caterpillar is the larval stage of certain hawk-moths, most famously Hemeroplanes triptolemus. It works by rearing up,…
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Albino Orcas: Are They Real and Why Are They White?
Albino orcas do exist, but most white killer whales photographed in the wild are not true albino. They are usually…
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What Is a Piggyback Heart Transplant and How Does It Work?
A piggyback heart transplant is a surgical technique, also called a heterotopic heart transplant, where a donor heart is connected…
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Who Was Sarah Biffin and Why Is She Important in Art History?
Sarah Biffin was a 19th century English artist best known for exquisitely detailed miniature portraits, created despite being born without…
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Why the 1,400-Year-Old Zapotec Burial Chamber Matters (What It Reveals)
The 1,400-year-old Zapotec burial chamber matters because it was found sealed with preserved wall paintings and ritual symbols, giving archaeologists…
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Echidna Penis: Why It Has Four Heads and How It Works
The echidna penis has four heads, and only two are used at a time during mating while the other two…
