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Why have all the ‘big’ animals and creatures gone extinct? Megalodon, the Dire Wolf? All these creatures were huge, top of the food chain predators but now don’t exist? Yet the sloth; slow, dumb an…

Mark Sterling
Mark Sterling
Research Editor · Jan 13, 2026 · Updated Apr 13, 2026

As per your example, a sloth survives on plants. It uses no energy because it virtually doesn't move. A sloth goes SO slow it actually can have moss grow on its fur.

100
Words

1 min
Read Time

#127
of 500 in Biology

+39%
vs Category Avg

The Short Answer

As per your example, a sloth survives on plants. It uses no energy because it virtually doesn't move. A sloth goes SO slow it actually can have moss grow on its fur. When predators hunt they go for sounds and sights. A piece of moss isn't that inviting. These animals survive because they're specialized to survive. I would guess that enormous apex predators are a burden on the environment and therefore when foods can't be found in enough abundance they die off (also note that most if not all extinctions for the past 10,000 years have been directly influenced by man).

Analysis

Key Concepts: Sloth, moss, predators

This explanation focuses on sloth, moss, predators and spans 100 words across 7 sentences. At 39% above the average Biology explanation (72 words), this is one of the more thorough answers in this category, reflecting the complexity of the underlying question.

What This Answer Covers

The explanation opens with: “As per your example, a sloth survives on plants.” It then elaborates by explaining the root cause, ultimately building toward a complete picture across 7 connected points.

How This Compares in Biology

Ranked #127 of 500 Biology questions by answer depth (top 26%). This falls in the detailed tier — above average depth. The explanation goes beyond surface-level but keeps things accessible.

Frequently Asked Questions

Is there a simple explanation for why all the 'big' animals and creatures gone extinct? megalodon, the dire wolf? all these creatures were huge, top of the food chain predators but now don't exist? yet the sloth; slow, dumb and effectively defenceless has somehow managed to survive?

As per your example, a sloth survives on plants. It uses no energy because it virtually doesn't move. A sloth goes SO slow it actually can have moss grow on its fur. When predators hunt they go for sounds and sights. A piece of moss isn't that…

How detailed is this explanation compared to similar Biology questions?

This is an above-average answer at 100 words, ranked #127 of 500 Biology questions by depth. The key concepts covered are sloth, moss, predators.

What approach does this answer take to explain all the 'big' animals and creatures gone extinct? megalodon,?

The explanation uses root cause analysis and concrete examples across 100 words. It is categorized under Biology and addresses the question through 2 analytical lenses.