Conversely, the "blitzkrieg" or overkill hypothesis positions early humans as the primary agents of destruction. Paleo-Indians, equipped with highly sophisticated Clovis projectile points, entered North America around this time. These hunters encountered native megafauna that had evolved in absolute isolation from human predators. Lacking naivety-breaking defensive adaptations, these beasts were remarkably vulnerable to coordinated hunting strategies. Critics of this model note the scarcity of definitive kill sites—archaeological zones showing direct evidence of mammoth butchery—arguing that human populations were simply too sparse to eradicate entire species across a vast continent. 1. Vocabulary
Take a passage and, for every paragraph, write a one-sentence summary in 10 words or less. Do this for 10 different passages. This trains your brain to spot the Topic Sentence and ignore the fluff. toefl reading exercise
According to Paragraph 2, what happened to the grasslands at the end of the ice age? Vocabulary Take a passage and, for every paragraph,
Deep feature: Treat it like learning a game’s rules, not like improving general English. According to Paragraph 2