Trapped in a Relationship

47-million-year-old-site in Germany finds first vertebrate fossils to directly document mating behavior.

Tick Tactic

Why the incidence of Lyme disease in North America has grown enormously and spread geographically during the past decade.

Serenading Cichlids

The overlooked role of sound as a matchmaking tool.

Gait Way

Using only its two forelimbs to propel itself on land, Ichthyostega may represent how first limbed animals transitioned from swimming like a fish to walking.

Bee Keepers

In windy conditions, bees choose flowers with conical-shaped cells on their petals in order to stay anchored while collecting nectar.

Decline and Fall of the Dinosaur Empire

New research suggests some groups of dinosaurs were already in decline before an asteroid hit Earth and eliminated most.

Killer Instinct

After deposited as eggs in the nests of other bird species, greater honeyguide hatchlings attack the nestlings of their hosts.

Air Drop

Raindrop pockmarks may provide clue to the density of Earth's atmosphere 2.7 billion years ago when the Sun was 30 percent dimmer than today.

Long-Distance Tweets

The tiny songbird, Northern Wheatear, has the stamina to make one of the farthest recorded migrations—scaled for body size—of any bird, as much as 9,000 miles in each direction between the North American Arctic and Africa.

Lil’ Lizards

Four new species of chameleons are discovered in Madagascar. Three rank among the world's smallest amniote vertebrates (the group comprising reptiles, birds, and mammals).

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