In the US, a bridge across a major 10-lane high speed freeway is being built at a cost of more than US$100 million so that ...

Many bird species are monogamous. However, genetic studies have shown that the social partner is often not the genetic father of all offspring. Some studies found biased sex ratios: more males than ...

This proposal is a big deal — monarchs are among the most recognizable and beloved animals in the US — and a long time coming. Environmental advocates have been urging the government to list them for ...