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Penn State

Penn State is a multi-campus public research university that educates students from Pennsylvania, the nation and the world. It improves the well-being and health of individuals and communities through integrated programs of teaching, research, and service.


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Segundo estudos recentes, alinhados com o que Darwin e Lamarck perceberam, é que a alimentação foi o principal motor da evolução do pescoço da girafa, mas com ênfase no sucesso reprodutivo feminino.

Nova pesquisa sugere que girafas fêmeas evoluíram os pescoços para comer folhas mais nutritivas

Os pescoços das girafas são um tema quente entre os biólogos. Um novo estudo contradiz uma teoria mais antiga que diz que as girafas machos precisam de pescoços longos para brigar pelas parceiras.
Pro-abortion rights demonstrators rally in Scottsdale, Ariz., on April 15, 2024. Frederic J. Brown/AFP via Getty Images

Other states, like Arizona, could resurrect laws on abortion, LGBTQ+ issues and more that have been lying dormant for more than 100 years

There are many outdated laws that states keep on the books, even if they aren’t used. If the Supreme Court overturns legal precedents on rights like same-sex and interracial marriage, that can change.
Massive gains in productivity haven’t led to more time free from work. J Studios/DigitalVision via Getty Images

Why is free time still so elusive?

In 1930, economist John Maynard Keynes famously predicted that within a century, the normal workweek would decrease to 15 hours. Why was he wrong?


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