Name the scientists who have contributed to the following:
Discovered double fertilization.

Explanation

**Step-by-Step Solution:**

1. **Understanding Double Fertilization**:
- Double fertilization is a unique process that occurs in angiosperms (flowering plants). It involves the fusion of two male gametes from a single pollen grain with two different cells in the ovule.

2. **Process of Double Fertilization**:
- When a pollen grain lands on the stigma of a flower, it germinates and produces two male gametes (sperm cells).
- One of these sperm cells fuses with the ovum (egg cell) to form a zygote, which is the first fertilization event.
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