Last year, Jaume Pellicer led a team of fellow scientists into a forest on Grande Terre, an island east of Australia. They were in search of a fern called Tmesipteris oblanceolata. Standing just a few inches tall, it was not easy to find on the forest floor.

“It doesn’t catch the eye,” said Dr. Pellicer, who works at the Botanical Institute of Barcelona in Spain. “You would probably step on it and not even realize it.”

Continue reading “Scientists Find the Largest Known Genome Inside a Small Plant” →

It takes a lot of energy to grow a baby — just ask anyone who has been pregnant. But scientists are only now discovering just how much.

In a study published on Thursday in the journal Science, Australian researchers estimated that a human pregnancy demands almost 50,000 dietary calories over the course of nine months. That’s the equivalent of about 50 pints of Ben and Jerry’s Cherry Garcia ice cream, and significantly more than the researchers expected.

Continue reading “Scientists Calculated the Energy Needed to Carry a Baby. Shocker: It’s a Lot.” →

Music baffled Charles Darwin. Mankind’s ability to produce and enjoy melodies, he wrote in 1874, “must be ranked amongst the most mysterious with which he is endowed.”

All human societies made music, and yet, for Darwin, it seemed to offer no advantage to our survival. He speculated that music evolved as a way to win over potential mates. Our “half-human ancestors,” as he called them, “aroused each other’s ardent passions during their courtship and rivalry.”

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The White House has unveiled tighter rules for research on potentially dangerous microbes and toxins, in an effort to stave off laboratory accidents that could unleash a pandemic.

The new policy, published Monday evening, arrives after years of deliberations by an expert panel and a charged public debate over whether Covid arose from an animal market or a laboratory in China.

A number of researchers worried that the government had been too lax about lab safety in the past, with some even calling for the creation of an independent agency to make decisions about risky experiments that could allow viruses, bacteria or fungi to spread quickly between people or become more deadly. But others warned against creating restrictive rules that would stifle valuable research without making people safer.

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