Related topics: evolutionary biology

Why are there so many species of beetles and so few crocodiles?

There are more than 400,000 species of beetles and only two species of the tuatara, a reptile cousin of snakes and lizards that lives in New Zealand. Crocodiles and alligators, while nearly 250 million years old, have diversified ...

Scientists develop methods to validate gene regulation networks

A team of biologists and computer scientists has mapped out a network of interactions for how plant genes coordinate their response to nitrogen, a crucial nutrient and the main component of fertilizer. The work, published ...

Famed US alien seeker shifts gaze back to Earth

After decades spent scanning the heavens for signs of life elsewhere in the cosmos, astronomer Jill Tarter is stepping back, and letting a colleague take charge of the quest.

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