This article states, “Scientists knew that some small carnivores hunted in packs . . . .” That sounds quite subjective to me. Finding many small theropods together with a possible victim can have many interpretations. Vultures mass at a carcass, but would you say they are pack hunters?

Russ Agreen
Danton, Md.

I can certainly understand the dinos hunting together and probably eating together, but dying together? What calamity caused an entire group to perish at once? A mudslide? A meteor? The salmon mousse? Is there any reason to believe that the bones found in this fossil were laid down within even 10 years of each other?

Lenny Foner
Somerville, Mass.

From the Nature Index

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