The golden lion tamarin, a one-pound primate that lives in Brazil, is a stunningly monogamous creature. A male will typically pair with a female and they will stay close for the rest of their lives, mating only with each other and then working together to care for their young.

To biologists, this deeply monogamous way of life — found in 9 percent of mammal species — is puzzling. A seemingly better evolutionary strategy for male mammals would be to spend their time looking for other females with which to mate.

Continue reading “Despite Two New Studies on Motives for Monogamy, the Debate Continues” →

You may have never set eyes on an oil palm tree, but it’s probably an intimate part of your everyday life. Whether you start your day with a shave or an application of lipstick, you are probably putting the oil from the tree’s fruits on your face. You buy a donut on the way to work, and with each bite, you swallow some of the palm oil in which it was cooked. After work, you stop at the supermarket, and about half the products on the shelves contain palm oil. Before bed, you scrub your face with soap and brush your teeth with toothpaste. They’re both palm oil’s way of wishing you good night.

Continue reading “Looking at Oil Palm’s Genome for Keys to Productivity” →

There was a time not that long ago when it was easy to tell the difference between viruses and the rest of life. Most obviously, viruses were tiny and genetically simple. The influenza virus, for example, measures about 100 nanometers across, and has just 13 genes.

Those two standards, it’s now clear, belong in the trash. Over the past decade, scientists have discovered a vast menagerie of viruses that are far bigger, and which carry enormous arsenals of genes. French researchers are now reporting the discovery of the biggest virus yet. The pandoravirus, as they’ve dubbed it, is 1,000 times bigger than the flu virus by volume and has nearly 200 times as many genes — 2,556 all told.

Continue reading “Changing View on Viruses: Not So Small After All” →

Depending on your point of view, barnyardgrass is a nightmare or a marvel.

That’s because it’s a supremely triumphant weed. Barnyardgrass can swoop in to fields and outcompete planted crops. It is particularly devastating on rice farms, where losses sometimes reach 100 percent. It has evolved resistance to a number of herbicides that farmers rely on to control weeds. Even when farmers think they have rid a field of barnyardgrass, they may not have actually won the battle. Each weed can produce up to a million seeds, which nestle into the soil, waiting for a chance to regrow.

Continue reading “Looking for Ways to Beat the Weeds” →